Home / 12,079.20-18,118.80-11,641.80

Finding the Fourth Proportional to 12,079.20, 18,118.80 and 11,641.80

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Solution

The fourth proportional to 12,079.20, 18,118.80 and 11,641.80 is: 17,462.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,079.20 : 18,118.80 = 11,641.80 : x
  2. Step 2: Convert to fraction form
    12,079.20/18,118.80 = 11,641.80/x
  3. Step 3: Cross multiply
    12,079.20x = 18,118.80 × 11,641.80
  4. Step 4: Simplify right side
    12,079.20x = 210,935,445.84
  5. Step 5: Solve for x
    x = 210,935,445.84/12,079.20
  6. Step 6: Final answer
    x = 17,462.70

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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.