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Finding the Fourth Proportional to 9,891.25, 13,649.93 and 5,475.25

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Solution

The fourth proportional to 9,891.25, 13,649.93 and 5,475.25 is: 7,555.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,891.25 : 13,649.93 = 5,475.25 : x
  2. Step 2: Convert to fraction form
    9,891.25/13,649.93 = 5,475.25/x
  3. Step 3: Cross multiply
    9,891.25x = 13,649.93 × 5,475.25
  4. Step 4: Simplify right side
    9,891.25x = 74,736,779.23
  5. Step 5: Solve for x
    x = 74,736,779.23/9,891.25
  6. Step 6: Final answer
    x = 7,555.85

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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.