Home / 20,380.56-28,125.47-11,882.45

Finding the Fourth Proportional to 20,380.56, 28,125.47 and 11,882.45

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Solution

The fourth proportional to 20,380.56, 28,125.47 and 11,882.45 is: 16,397.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,380.56 : 28,125.47 = 11,882.45 : x
  2. Step 2: Convert to fraction form
    20,380.56/28,125.47 = 11,882.45/x
  3. Step 3: Cross multiply
    20,380.56x = 28,125.47 × 11,882.45
  4. Step 4: Simplify right side
    20,380.56x = 334,199,380.08
  5. Step 5: Solve for x
    x = 334,199,380.08/20,380.56
  6. Step 6: Final answer
    x = 16,397.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.