Home / 21,519.36-29,691.50-12,561.74

Finding the Fourth Proportional to 21,519.36, 29,691.50 and 12,561.74

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Solution

The fourth proportional to 21,519.36, 29,691.50 and 12,561.74 is: 17,332.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,519.36 : 29,691.50 = 12,561.74 : x
  2. Step 2: Convert to fraction form
    21,519.36/29,691.50 = 12,561.74/x
  3. Step 3: Cross multiply
    21,519.36x = 29,691.50 × 12,561.74
  4. Step 4: Simplify right side
    21,519.36x = 372,976,903.21
  5. Step 5: Solve for x
    x = 372,976,903.21/21,519.36
  6. Step 6: Final answer
    x = 17,332.16

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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.