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Finding the Fourth Proportional to 21,572.52, 29,769.12 and 12,012.90

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Solution

The fourth proportional to 21,572.52, 29,769.12 and 12,012.90 is: 16,577.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,572.52 : 29,769.12 = 12,012.90 : x
  2. Step 2: Convert to fraction form
    21,572.52/29,769.12 = 12,012.90/x
  3. Step 3: Cross multiply
    21,572.52x = 29,769.12 × 12,012.90
  4. Step 4: Simplify right side
    21,572.52x = 357,613,461.65
  5. Step 5: Solve for x
    x = 357,613,461.65/21,572.52
  6. Step 6: Final answer
    x = 16,577.27

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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.