Home / 15,428.60-21,291.54-8,714.31

Finding the Fourth Proportional to 15,428.60, 21,291.54 and 8,714.31

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Solution

The fourth proportional to 15,428.60, 21,291.54 and 8,714.31 is: 12,025.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,428.60 : 21,291.54 = 8,714.31 : x
  2. Step 2: Convert to fraction form
    15,428.60/21,291.54 = 8,714.31/x
  3. Step 3: Cross multiply
    15,428.60x = 21,291.54 × 8,714.31
  4. Step 4: Simplify right side
    15,428.60x = 185,541,079.94
  5. Step 5: Solve for x
    x = 185,541,079.94/15,428.60
  6. Step 6: Final answer
    x = 12,025.79

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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.