Home / 15,788.31-21,787.75-8,714.73

Finding the Fourth Proportional to 15,788.31, 21,787.75 and 8,714.73

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Solution

The fourth proportional to 15,788.31, 21,787.75 and 8,714.73 is: 12,026.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,788.31 : 21,787.75 = 8,714.73 : x
  2. Step 2: Convert to fraction form
    15,788.31/21,787.75 = 8,714.73/x
  3. Step 3: Cross multiply
    15,788.31x = 21,787.75 × 8,714.73
  4. Step 4: Simplify right side
    15,788.31x = 189,874,358.56
  5. Step 5: Solve for x
    x = 189,874,358.56/15,788.31
  6. Step 6: Final answer
    x = 12,026.26

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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.