Home / 9,921.53-13,691.88-5,445.70

Finding the Fourth Proportional to 9,921.53, 13,691.88 and 5,445.70

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Solution

The fourth proportional to 9,921.53, 13,691.88 and 5,445.70 is: 7,515.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,921.53 : 13,691.88 = 5,445.70 : x
  2. Step 2: Convert to fraction form
    9,921.53/13,691.88 = 5,445.70/x
  3. Step 3: Cross multiply
    9,921.53x = 13,691.88 × 5,445.70
  4. Step 4: Simplify right side
    9,921.53x = 74,561,775.23
  5. Step 5: Solve for x
    x = 74,561,775.23/9,921.53
  6. Step 6: Final answer
    x = 7,515.15

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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.