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Finding the Fourth Proportional to 21,456.57, 29,610.99 and 12,025.08

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Solution

The fourth proportional to 21,456.57, 29,610.99 and 12,025.08 is: 16,595.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,456.57 : 29,610.99 = 12,025.08 : x
  2. Step 2: Convert to fraction form
    21,456.57/29,610.99 = 12,025.08/x
  3. Step 3: Cross multiply
    21,456.57x = 29,610.99 × 12,025.08
  4. Step 4: Simplify right side
    21,456.57x = 356,074,523.63
  5. Step 5: Solve for x
    x = 356,074,523.63/21,456.57
  6. Step 6: Final answer
    x = 16,595.13

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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.