Home / 12,178.77-18,269.73-4,280.73

Finding the Fourth Proportional to 12,178.77, 18,269.73 and 4,280.73

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Solution

The fourth proportional to 12,178.77, 18,269.73 and 4,280.73 is: 6,421.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,178.77 : 18,269.73 = 4,280.73 : x
  2. Step 2: Convert to fraction form
    12,178.77/18,269.73 = 4,280.73/x
  3. Step 3: Cross multiply
    12,178.77x = 18,269.73 × 4,280.73
  4. Step 4: Simplify right side
    12,178.77x = 78,207,781.30
  5. Step 5: Solve for x
    x = 78,207,781.30/12,178.77
  6. Step 6: Final answer
    x = 6,421.65

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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.