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Finding the Fourth Proportional to 20,351.52, 30,535.16 and 7,868.07

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Solution

The fourth proportional to 20,351.52, 30,535.16 and 7,868.07 is: 11,805.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,351.52 : 30,535.16 = 7,868.07 : x
  2. Step 2: Convert to fraction form
    20,351.52/30,535.16 = 7,868.07/x
  3. Step 3: Cross multiply
    20,351.52x = 30,535.16 × 7,868.07
  4. Step 4: Simplify right side
    20,351.52x = 240,252,737.00
  5. Step 5: Solve for x
    x = 240,252,737.00/20,351.52
  6. Step 6: Final answer
    x = 11,805.15

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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.