Home / 7,143.11-10,711.15-4,220.63

Finding the Fourth Proportional to 7,143.11, 10,711.15 and 4,220.63

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Solution

The fourth proportional to 7,143.11, 10,711.15 and 4,220.63 is: 6,328.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,143.11 : 10,711.15 = 4,220.63 : x
  2. Step 2: Convert to fraction form
    7,143.11/10,711.15 = 4,220.63/x
  3. Step 3: Cross multiply
    7,143.11x = 10,711.15 × 4,220.63
  4. Step 4: Simplify right side
    7,143.11x = 45,207,801.02
  5. Step 5: Solve for x
    x = 45,207,801.02/7,143.11
  6. Step 6: Final answer
    x = 6,328.87

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.