Home / 20,631.74-28,472.13-11,200.30

Finding the Fourth Proportional to 20,631.74, 28,472.13 and 11,200.30

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Solution

The fourth proportional to 20,631.74, 28,472.13 and 11,200.30 is: 15,456.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,631.74 : 28,472.13 = 11,200.30 : x
  2. Step 2: Convert to fraction form
    20,631.74/28,472.13 = 11,200.30/x
  3. Step 3: Cross multiply
    20,631.74x = 28,472.13 × 11,200.30
  4. Step 4: Simplify right side
    20,631.74x = 318,896,326.46
  5. Step 5: Solve for x
    x = 318,896,326.46/20,631.74
  6. Step 6: Final answer
    x = 15,456.59

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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.