Home / 15,788.52-21,787.62-8,714.28

Finding the Fourth Proportional to 15,788.52, 21,787.62 and 8,714.28

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Solution

The fourth proportional to 15,788.52, 21,787.62 and 8,714.28 is: 12,025.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,788.52 : 21,787.62 = 8,714.28 : x
  2. Step 2: Convert to fraction form
    15,788.52/21,787.62 = 8,714.28/x
  3. Step 3: Cross multiply
    15,788.52x = 21,787.62 × 8,714.28
  4. Step 4: Simplify right side
    15,788.52x = 189,863,421.21
  5. Step 5: Solve for x
    x = 189,863,421.21/15,788.52
  6. Step 6: Final answer
    x = 12,025.41

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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.