Home / 31,787.65-43,854.85-18,354

Finding the Fourth Proportional to 31,787.65, 43,854.85 and 18,354

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Solution

The fourth proportional to 31,787.65, 43,854.85 and 18,354 is: 25,321.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,787.65 : 43,854.85 = 18,354 : x
  2. Step 2: Convert to fraction form
    31,787.65/43,854.85 = 18,354/x
  3. Step 3: Cross multiply
    31,787.65x = 43,854.85 × 18,354
  4. Step 4: Simplify right side
    31,787.65x = 804,911,916.90
  5. Step 5: Solve for x
    x = 804,911,916.90/31,787.65
  6. Step 6: Final answer
    x = 25,321.53

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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.