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Finding the Fourth Proportional to 9,642.76, 13,307.68 and 5,394.23

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Solution

The fourth proportional to 9,642.76, 13,307.68 and 5,394.23 is: 7,444.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,642.76 : 13,307.68 = 5,394.23 : x
  2. Step 2: Convert to fraction form
    9,642.76/13,307.68 = 5,394.23/x
  3. Step 3: Cross multiply
    9,642.76x = 13,307.68 × 5,394.23
  4. Step 4: Simplify right side
    9,642.76x = 71,784,646.45
  5. Step 5: Solve for x
    x = 71,784,646.45/9,642.76
  6. Step 6: Final answer
    x = 7,444.41

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Find fourth proportional to 4,821.38, 6,653.84 and 2,697.11
Half scale
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Double scale
Find fourth proportional to 9,643.76, 13,309.06 and 5,395.23
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.