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Finding the Fourth Proportional to 21,338.28, 32,007.42 and 7,487.28

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Solution

The fourth proportional to 21,338.28, 32,007.42 and 7,487.28 is: 11,230.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,338.28 : 32,007.42 = 7,487.28 : x
  2. Step 2: Convert to fraction form
    21,338.28/32,007.42 = 7,487.28/x
  3. Step 3: Cross multiply
    21,338.28x = 32,007.42 × 7,487.28
  4. Step 4: Simplify right side
    21,338.28x = 239,648,515.62
  5. Step 5: Solve for x
    x = 239,648,515.62/21,338.28
  6. Step 6: Final answer
    x = 11,230.92

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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.