Home / 20,901.50-28,845.86-11,471.88

Finding the Fourth Proportional to 20,901.50, 28,845.86 and 11,471.88

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Solution

The fourth proportional to 20,901.50, 28,845.86 and 11,471.88 is: 15,832.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,901.50 : 28,845.86 = 11,471.88 : x
  2. Step 2: Convert to fraction form
    20,901.50/28,845.86 = 11,471.88/x
  3. Step 3: Cross multiply
    20,901.50x = 28,845.86 × 11,471.88
  4. Step 4: Simplify right side
    20,901.50x = 330,916,244.42
  5. Step 5: Solve for x
    x = 330,916,244.42/20,901.50
  6. Step 6: Final answer
    x = 15,832.18

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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.