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Finding the Fourth Proportional to 21,665.92, 32,486.72 and 6,872.08

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Solution

The fourth proportional to 21,665.92, 32,486.72 and 6,872.08 is: 10,304.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,665.92 : 32,486.72 = 6,872.08 : x
  2. Step 2: Convert to fraction form
    21,665.92/32,486.72 = 6,872.08/x
  3. Step 3: Cross multiply
    21,665.92x = 32,486.72 × 6,872.08
  4. Step 4: Simplify right side
    21,665.92x = 223,251,338.78
  5. Step 5: Solve for x
    x = 223,251,338.78/21,665.92
  6. Step 6: Final answer
    x = 10,304.26

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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.