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Finding the Fourth Proportional to 7,131.46, 9,839.22 and 4,146.76

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Solution

The fourth proportional to 7,131.46, 9,839.22 and 4,146.76 is: 5,721.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,131.46 : 9,839.22 = 4,146.76 : x
  2. Step 2: Convert to fraction form
    7,131.46/9,839.22 = 4,146.76/x
  3. Step 3: Cross multiply
    7,131.46x = 9,839.22 × 4,146.76
  4. Step 4: Simplify right side
    7,131.46x = 40,800,883.93
  5. Step 5: Solve for x
    x = 40,800,883.93/7,131.46
  6. Step 6: Final answer
    x = 5,721.25

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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.