Home / 20,288.10-30,432.15-11,972.10

Finding the Fourth Proportional to 20,288.10, 30,432.15 and 11,972.10

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Solution

The fourth proportional to 20,288.10, 30,432.15 and 11,972.10 is: 17,958.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,288.10 : 30,432.15 = 11,972.10 : x
  2. Step 2: Convert to fraction form
    20,288.10/30,432.15 = 11,972.10/x
  3. Step 3: Cross multiply
    20,288.10x = 30,432.15 × 11,972.10
  4. Step 4: Simplify right side
    20,288.10x = 364,336,743.02
  5. Step 5: Solve for x
    x = 364,336,743.02/20,288.10
  6. Step 6: Final answer
    x = 17,958.15

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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.