Home / 15,788.40-21,787.56-8,714.31

Finding the Fourth Proportional to 15,788.40, 21,787.56 and 8,714.31

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Solution

The fourth proportional to 15,788.40, 21,787.56 and 8,714.31 is: 12,025.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,788.40 : 21,787.56 = 8,714.31 : x
  2. Step 2: Convert to fraction form
    15,788.40/21,787.56 = 8,714.31/x
  3. Step 3: Cross multiply
    15,788.40x = 21,787.56 × 8,714.31
  4. Step 4: Simplify right side
    15,788.40x = 189,863,551.98
  5. Step 5: Solve for x
    x = 189,863,551.98/15,788.40
  6. Step 6: Final answer
    x = 12,025.51

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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.