Home / 12,278.86-18,419.67-3,956.98

Finding the Fourth Proportional to 12,278.86, 18,419.67 and 3,956.98

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Solution

The fourth proportional to 12,278.86, 18,419.67 and 3,956.98 is: 5,935.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,278.86 : 18,419.67 = 3,956.98 : x
  2. Step 2: Convert to fraction form
    12,278.86/18,419.67 = 3,956.98/x
  3. Step 3: Cross multiply
    12,278.86x = 18,419.67 × 3,956.98
  4. Step 4: Simplify right side
    12,278.86x = 72,886,265.80
  5. Step 5: Solve for x
    x = 72,886,265.80/12,278.86
  6. Step 6: Final answer
    x = 5,935.91

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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.