Home / 12,278.76-18,418.80-3,958.17

Finding the Fourth Proportional to 12,278.76, 18,418.80 and 3,958.17

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Solution

The fourth proportional to 12,278.76, 18,418.80 and 3,958.17 is: 5,937.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,278.76 : 18,418.80 = 3,958.17 : x
  2. Step 2: Convert to fraction form
    12,278.76/18,418.80 = 3,958.17/x
  3. Step 3: Cross multiply
    12,278.76x = 18,418.80 × 3,958.17
  4. Step 4: Simplify right side
    12,278.76x = 72,904,741.60
  5. Step 5: Solve for x
    x = 72,904,741.60/12,278.76
  6. Step 6: Final answer
    x = 5,937.47

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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.