Home / 12,178.38-18,269.60-4,278.86

Finding the Fourth Proportional to 12,178.38, 18,269.60 and 4,278.86

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Solution

The fourth proportional to 12,178.38, 18,269.60 and 4,278.86 is: 6,419.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,178.38 : 18,269.60 = 4,278.86 : x
  2. Step 2: Convert to fraction form
    12,178.38/18,269.60 = 4,278.86/x
  3. Step 3: Cross multiply
    12,178.38x = 18,269.60 × 4,278.86
  4. Step 4: Simplify right side
    12,178.38x = 78,173,060.66
  5. Step 5: Solve for x
    x = 78,173,060.66/12,178.38
  6. Step 6: Final answer
    x = 6,419.00

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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.