Home / 20,472.72-28,252.79-11,520.23

Finding the Fourth Proportional to 20,472.72, 28,252.79 and 11,520.23

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Solution

The fourth proportional to 20,472.72, 28,252.79 and 11,520.23 is: 15,898.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,472.72 : 28,252.79 = 11,520.23 : x
  2. Step 2: Convert to fraction form
    20,472.72/28,252.79 = 11,520.23/x
  3. Step 3: Cross multiply
    20,472.72x = 28,252.79 × 11,520.23
  4. Step 4: Simplify right side
    20,472.72x = 325,478,638.94
  5. Step 5: Solve for x
    x = 325,478,638.94/20,472.72
  6. Step 6: Final answer
    x = 15,898.16

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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.