Home / 15,788.30-21,787.92-8,714.97

Finding the Fourth Proportional to 15,788.30, 21,787.92 and 8,714.97

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Solution

The fourth proportional to 15,788.30, 21,787.92 and 8,714.97 is: 12,026.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,788.30 : 21,787.92 = 8,714.97 : x
  2. Step 2: Convert to fraction form
    15,788.30/21,787.92 = 8,714.97/x
  3. Step 3: Cross multiply
    15,788.30x = 21,787.92 × 8,714.97
  4. Step 4: Simplify right side
    15,788.30x = 189,881,069.16
  5. Step 5: Solve for x
    x = 189,881,069.16/15,788.30
  6. Step 6: Final answer
    x = 12,026.70

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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.