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Finding the Fourth Proportional to 9,642.92, 13,305.54 and 5,918.12

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Solution

The fourth proportional to 9,642.92, 13,305.54 and 5,918.12 is: 8,165.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,642.92 : 13,305.54 = 5,918.12 : x
  2. Step 2: Convert to fraction form
    9,642.92/13,305.54 = 5,918.12/x
  3. Step 3: Cross multiply
    9,642.92x = 13,305.54 × 5,918.12
  4. Step 4: Simplify right side
    9,642.92x = 78,743,782.38
  5. Step 5: Solve for x
    x = 78,743,782.38/9,642.92
  6. Step 6: Final answer
    x = 8,165.97

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Half scale
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Double scale
Find fourth proportional to 9,643.92, 13,306.92 and 5,919.12
Similar ratio
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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.