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Finding the Fourth Proportional to 20,528.75, 30,793.13 and 7,381.13

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Solution

The fourth proportional to 20,528.75, 30,793.13 and 7,381.13 is: 11,071.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,528.75 : 30,793.13 = 7,381.13 : x
  2. Step 2: Convert to fraction form
    20,528.75/30,793.13 = 7,381.13/x
  3. Step 3: Cross multiply
    20,528.75x = 30,793.13 × 7,381.13
  4. Step 4: Simplify right side
    20,528.75x = 227,287,948.01
  5. Step 5: Solve for x
    x = 227,287,948.01/20,528.75
  6. Step 6: Final answer
    x = 11,071.69

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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.