Home / 15,788.28-21,787.83-8,714.71

Finding the Fourth Proportional to 15,788.28, 21,787.83 and 8,714.71

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Solution

The fourth proportional to 15,788.28, 21,787.83 and 8,714.71 is: 12,026.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,788.28 : 21,787.83 = 8,714.71 : x
  2. Step 2: Convert to fraction form
    15,788.28/21,787.83 = 8,714.71/x
  3. Step 3: Cross multiply
    15,788.28x = 21,787.83 × 8,714.71
  4. Step 4: Simplify right side
    15,788.28x = 189,874,511.04
  5. Step 5: Solve for x
    x = 189,874,511.04/15,788.28
  6. Step 6: Final answer
    x = 12,026.29

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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.