Home / 21,234.38-29,299.11-12,278.61

Finding the Fourth Proportional to 21,234.38, 29,299.11 and 12,278.61

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Solution

The fourth proportional to 21,234.38, 29,299.11 and 12,278.61 is: 16,941.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,234.38 : 29,299.11 = 12,278.61 : x
  2. Step 2: Convert to fraction form
    21,234.38/29,299.11 = 12,278.61/x
  3. Step 3: Cross multiply
    21,234.38x = 29,299.11 × 12,278.61
  4. Step 4: Simplify right side
    21,234.38x = 359,752,345.04
  5. Step 5: Solve for x
    x = 359,752,345.04/21,234.38
  6. Step 6: Final answer
    x = 16,941.98

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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.