Home / 10,128.78-15,193.17-4,285.44

Finding the Fourth Proportional to 10,128.78, 15,193.17 and 4,285.44

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Solution

The fourth proportional to 10,128.78, 15,193.17 and 4,285.44 is: 6,428.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,128.78 : 15,193.17 = 4,285.44 : x
  2. Step 2: Convert to fraction form
    10,128.78/15,193.17 = 4,285.44/x
  3. Step 3: Cross multiply
    10,128.78x = 15,193.17 × 4,285.44
  4. Step 4: Simplify right side
    10,128.78x = 65,109,418.44
  5. Step 5: Solve for x
    x = 65,109,418.44/10,128.78
  6. Step 6: Final answer
    x = 6,428.16

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.