Home / 22,787.45-31,445.94-12,438.80

Finding the Fourth Proportional to 22,787.45, 31,445.94 and 12,438.80

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Solution

The fourth proportional to 22,787.45, 31,445.94 and 12,438.80 is: 17,165.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,787.45 : 31,445.94 = 12,438.80 : x
  2. Step 2: Convert to fraction form
    22,787.45/31,445.94 = 12,438.80/x
  3. Step 3: Cross multiply
    22,787.45x = 31,445.94 × 12,438.80
  4. Step 4: Simplify right side
    22,787.45x = 391,149,758.47
  5. Step 5: Solve for x
    x = 391,149,758.47/22,787.45
  6. Step 6: Final answer
    x = 17,165.14

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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.