Home / 20,769.28-31,157.56-8,930.32

Finding the Fourth Proportional to 20,769.28, 31,157.56 and 8,930.32

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Solution

The fourth proportional to 20,769.28, 31,157.56 and 8,930.32 is: 13,397.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,769.28 : 31,157.56 = 8,930.32 : x
  2. Step 2: Convert to fraction form
    20,769.28/31,157.56 = 8,930.32/x
  3. Step 3: Cross multiply
    20,769.28x = 31,157.56 × 8,930.32
  4. Step 4: Simplify right side
    20,769.28x = 278,246,981.22
  5. Step 5: Solve for x
    x = 278,246,981.22/20,769.28
  6. Step 6: Final answer
    x = 13,397.05

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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.