Home / 10,278.89-15,418.34-2,487.70

Finding the Fourth Proportional to 10,278.89, 15,418.34 and 2,487.70

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Solution

The fourth proportional to 10,278.89, 15,418.34 and 2,487.70 is: 3,731.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,278.89 : 15,418.34 = 2,487.70 : x
  2. Step 2: Convert to fraction form
    10,278.89/15,418.34 = 2,487.70/x
  3. Step 3: Cross multiply
    10,278.89x = 15,418.34 × 2,487.70
  4. Step 4: Simplify right side
    10,278.89x = 38,356,204.42
  5. Step 5: Solve for x
    x = 38,356,204.42/10,278.89
  6. Step 6: Final answer
    x = 3,731.55

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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.