Home / 21,515.38-29,691.15-11,955.23

Finding the Fourth Proportional to 21,515.38, 29,691.15 and 11,955.23

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Solution

The fourth proportional to 21,515.38, 29,691.15 and 11,955.23 is: 16,498.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,515.38 : 29,691.15 = 11,955.23 : x
  2. Step 2: Convert to fraction form
    21,515.38/29,691.15 = 11,955.23/x
  3. Step 3: Cross multiply
    21,515.38x = 29,691.15 × 11,955.23
  4. Step 4: Simplify right side
    21,515.38x = 354,964,527.21
  5. Step 5: Solve for x
    x = 354,964,527.21/21,515.38
  6. Step 6: Final answer
    x = 16,498.18

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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.