Home / 12,135.12-18,178.20-8,377.68

Finding the Fourth Proportional to 12,135.12, 18,178.20 and 8,377.68

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Solution

The fourth proportional to 12,135.12, 18,178.20 and 8,377.68 is: 12,549.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,135.12 : 18,178.20 = 8,377.68 : x
  2. Step 2: Convert to fraction form
    12,135.12/18,178.20 = 8,377.68/x
  3. Step 3: Cross multiply
    12,135.12x = 18,178.20 × 8,377.68
  4. Step 4: Simplify right side
    12,135.12x = 152,291,142.58
  5. Step 5: Solve for x
    x = 152,291,142.58/12,135.12
  6. Step 6: Final answer
    x = 12,549.62

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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.