Home / 20,278.86-30,418.17-5,487.75

Finding the Fourth Proportional to 20,278.86, 30,418.17 and 5,487.75

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Solution

The fourth proportional to 20,278.86, 30,418.17 and 5,487.75 is: 8,231.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,278.86 : 30,418.17 = 5,487.75 : x
  2. Step 2: Convert to fraction form
    20,278.86/30,418.17 = 5,487.75/x
  3. Step 3: Cross multiply
    20,278.86x = 30,418.17 × 5,487.75
  4. Step 4: Simplify right side
    20,278.86x = 166,927,312.42
  5. Step 5: Solve for x
    x = 166,927,312.42/20,278.86
  6. Step 6: Final answer
    x = 8,231.59

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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.