Home / 21,221.95-29,286.16-11,531.32

Finding the Fourth Proportional to 21,221.95, 29,286.16 and 11,531.32

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Solution

The fourth proportional to 21,221.95, 29,286.16 and 11,531.32 is: 15,913.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,221.95 : 29,286.16 = 11,531.32 : x
  2. Step 2: Convert to fraction form
    21,221.95/29,286.16 = 11,531.32/x
  3. Step 3: Cross multiply
    21,221.95x = 29,286.16 × 11,531.32
  4. Step 4: Simplify right side
    21,221.95x = 337,708,082.53
  5. Step 5: Solve for x
    x = 337,708,082.53/21,221.95
  6. Step 6: Final answer
    x = 15,913.15

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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.