Home / 5,425.13-8,137.70-1,321.13

Finding the Fourth Proportional to 5,425.13, 8,137.70 and 1,321.13

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Solution

The fourth proportional to 5,425.13, 8,137.70 and 1,321.13 is: 1,981.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,425.13 : 8,137.70 = 1,321.13 : x
  2. Step 2: Convert to fraction form
    5,425.13/8,137.70 = 1,321.13/x
  3. Step 3: Cross multiply
    5,425.13x = 8,137.70 × 1,321.13
  4. Step 4: Simplify right side
    5,425.13x = 10,750,959.60
  5. Step 5: Solve for x
    x = 10,750,959.60/5,425.13
  6. Step 6: Final answer
    x = 1,981.70

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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.