Home / 12,186.17-18,279.96-3,421.77

Finding the Fourth Proportional to 12,186.17, 18,279.96 and 3,421.77

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Solution

The fourth proportional to 12,186.17, 18,279.96 and 3,421.77 is: 5,132.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,186.17 : 18,279.96 = 3,421.77 : x
  2. Step 2: Convert to fraction form
    12,186.17/18,279.96 = 3,421.77/x
  3. Step 3: Cross multiply
    12,186.17x = 18,279.96 × 3,421.77
  4. Step 4: Simplify right side
    12,186.17x = 62,549,818.73
  5. Step 5: Solve for x
    x = 62,549,818.73/12,186.17
  6. Step 6: Final answer
    x = 5,132.85

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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.