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Finding the Fourth Proportional to 20,400.62, 30,605.79 and 7,254.14

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Solution

The fourth proportional to 20,400.62, 30,605.79 and 7,254.14 is: 10,882.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,400.62 : 30,605.79 = 7,254.14 : x
  2. Step 2: Convert to fraction form
    20,400.62/30,605.79 = 7,254.14/x
  3. Step 3: Cross multiply
    20,400.62x = 30,605.79 × 7,254.14
  4. Step 4: Simplify right side
    20,400.62x = 222,018,685.47
  5. Step 5: Solve for x
    x = 222,018,685.47/20,400.62
  6. Step 6: Final answer
    x = 10,882.94

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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.