Home / 20,472.81-28,252.13-11,520.30

Finding the Fourth Proportional to 20,472.81, 28,252.13 and 11,520.30

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Solution

The fourth proportional to 20,472.81, 28,252.13 and 11,520.30 is: 15,897.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,472.81 : 28,252.13 = 11,520.30 : x
  2. Step 2: Convert to fraction form
    20,472.81/28,252.13 = 11,520.30/x
  3. Step 3: Cross multiply
    20,472.81x = 28,252.13 × 11,520.30
  4. Step 4: Simplify right side
    20,472.81x = 325,473,013.24
  5. Step 5: Solve for x
    x = 325,473,013.24/20,472.81
  6. Step 6: Final answer
    x = 15,897.82

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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.