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Finding the Fourth Proportional to 20,639.52, 30,959.20 and 8,327.52

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Solution

The fourth proportional to 20,639.52, 30,959.20 and 8,327.52 is: 12,491.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,639.52 : 30,959.20 = 8,327.52 : x
  2. Step 2: Convert to fraction form
    20,639.52/30,959.20 = 8,327.52/x
  3. Step 3: Cross multiply
    20,639.52x = 30,959.20 × 8,327.52
  4. Step 4: Simplify right side
    20,639.52x = 257,813,357.18
  5. Step 5: Solve for x
    x = 257,813,357.18/20,639.52
  6. Step 6: Final answer
    x = 12,491.25

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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.