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Finding the Fourth Proportional to 20,432.97, 30,653.10 and 7,959.78

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Solution

The fourth proportional to 20,432.97, 30,653.10 and 7,959.78 is: 11,941.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,432.97 : 30,653.10 = 7,959.78 : x
  2. Step 2: Convert to fraction form
    20,432.97/30,653.10 = 7,959.78/x
  3. Step 3: Cross multiply
    20,432.97x = 30,653.10 × 7,959.78
  4. Step 4: Simplify right side
    20,432.97x = 243,991,932.32
  5. Step 5: Solve for x
    x = 243,991,932.32/20,432.97
  6. Step 6: Final answer
    x = 11,941.09

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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.