Home / 20,472.81-28,252.33-11,520.38

Finding the Fourth Proportional to 20,472.81, 28,252.33 and 11,520.38

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Solution

The fourth proportional to 20,472.81, 28,252.33 and 11,520.38 is: 15,898.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,472.81 : 28,252.33 = 11,520.38 : x
  2. Step 2: Convert to fraction form
    20,472.81/28,252.33 = 11,520.38/x
  3. Step 3: Cross multiply
    20,472.81x = 28,252.33 × 11,520.38
  4. Step 4: Simplify right side
    20,472.81x = 325,477,577.49
  5. Step 5: Solve for x
    x = 325,477,577.49/20,472.81
  6. Step 6: Final answer
    x = 15,898.04

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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.