Home / 22,621.78-31,217.78-12,549.97

Finding the Fourth Proportional to 22,621.78, 31,217.78 and 12,549.97

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Solution

The fourth proportional to 22,621.78, 31,217.78 and 12,549.97 is: 17,318.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,621.78 : 31,217.78 = 12,549.97 : x
  2. Step 2: Convert to fraction form
    22,621.78/31,217.78 = 12,549.97/x
  3. Step 3: Cross multiply
    22,621.78x = 31,217.78 × 12,549.97
  4. Step 4: Simplify right side
    22,621.78x = 391,781,983.63
  5. Step 5: Solve for x
    x = 391,781,983.63/22,621.78
  6. Step 6: Final answer
    x = 17,318.80

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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.