Home / 21,439.61-29,601.11-13,385.54

Finding the Fourth Proportional to 21,439.61, 29,601.11 and 13,385.54

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Solution

The fourth proportional to 21,439.61, 29,601.11 and 13,385.54 is: 18,481.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,439.61 : 29,601.11 = 13,385.54 : x
  2. Step 2: Convert to fraction form
    21,439.61/29,601.11 = 13,385.54/x
  3. Step 3: Cross multiply
    21,439.61x = 29,601.11 × 13,385.54
  4. Step 4: Simplify right side
    21,439.61x = 396,226,841.95
  5. Step 5: Solve for x
    x = 396,226,841.95/21,439.61
  6. Step 6: Final answer
    x = 18,481.07

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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.