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Finding the Fourth Proportional to 22,894.78, 31,600.90 and 21,500.76

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Solution

The fourth proportional to 22,894.78, 31,600.90 and 21,500.76 is: 29,676.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,894.78 : 31,600.90 = 21,500.76 : x
  2. Step 2: Convert to fraction form
    22,894.78/31,600.90 = 21,500.76/x
  3. Step 3: Cross multiply
    22,894.78x = 31,600.90 × 21,500.76
  4. Step 4: Simplify right side
    22,894.78x = 679,443,366.68
  5. Step 5: Solve for x
    x = 679,443,366.68/22,894.78
  6. Step 6: Final answer
    x = 29,676.78

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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.