Home / 15,428.75-21,291.26-8,714.39

Finding the Fourth Proportional to 15,428.75, 21,291.26 and 8,714.39

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Solution

The fourth proportional to 15,428.75, 21,291.26 and 8,714.39 is: 12,025.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,428.75 : 21,291.26 = 8,714.39 : x
  2. Step 2: Convert to fraction form
    15,428.75/21,291.26 = 8,714.39/x
  3. Step 3: Cross multiply
    15,428.75x = 21,291.26 × 8,714.39
  4. Step 4: Simplify right side
    15,428.75x = 185,540,193.20
  5. Step 5: Solve for x
    x = 185,540,193.20/15,428.75
  6. Step 6: Final answer
    x = 12,025.62

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Half scale
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Double scale
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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.