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Finding the Fourth Proportional to 20,543.78, 30,808.38 and 7,392.62

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Solution

The fourth proportional to 20,543.78, 30,808.38 and 7,392.62 is: 11,086.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,543.78 : 30,808.38 = 7,392.62 : x
  2. Step 2: Convert to fraction form
    20,543.78/30,808.38 = 7,392.62/x
  3. Step 3: Cross multiply
    20,543.78x = 30,808.38 × 7,392.62
  4. Step 4: Simplify right side
    20,543.78x = 227,754,646.16
  5. Step 5: Solve for x
    x = 227,754,646.16/20,543.78
  6. Step 6: Final answer
    x = 11,086.31

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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.