Home / 20,426.91-28,191.17-13,726.49

Finding the Fourth Proportional to 20,426.91, 28,191.17 and 13,726.49

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Solution

The fourth proportional to 20,426.91, 28,191.17 and 13,726.49 is: 18,943.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,426.91 : 28,191.17 = 13,726.49 : x
  2. Step 2: Convert to fraction form
    20,426.91/28,191.17 = 13,726.49/x
  3. Step 3: Cross multiply
    20,426.91x = 28,191.17 × 13,726.49
  4. Step 4: Simplify right side
    20,426.91x = 386,965,672.14
  5. Step 5: Solve for x
    x = 386,965,672.14/20,426.91
  6. Step 6: Final answer
    x = 18,943.92

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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.