Home / 15,787.62-21,787.04-8,617.59

Finding the Fourth Proportional to 15,787.62, 21,787.04 and 8,617.59

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Solution

The fourth proportional to 15,787.62, 21,787.04 and 8,617.59 is: 11,892.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,787.62 : 21,787.04 = 8,617.59 : x
  2. Step 2: Convert to fraction form
    15,787.62/21,787.04 = 8,617.59/x
  3. Step 3: Cross multiply
    15,787.62x = 21,787.04 × 8,617.59
  4. Step 4: Simplify right side
    15,787.62x = 187,751,734.95
  5. Step 5: Solve for x
    x = 187,751,734.95/15,787.62
  6. Step 6: Final answer
    x = 11,892.34

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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.