Home / 12,079.80-18,095.40-8,143.20

Finding the Fourth Proportional to 12,079.80, 18,095.40 and 8,143.20

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Solution

The fourth proportional to 12,079.80, 18,095.40 and 8,143.20 is: 12,198.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,079.80 : 18,095.40 = 8,143.20 : x
  2. Step 2: Convert to fraction form
    12,079.80/18,095.40 = 8,143.20/x
  3. Step 3: Cross multiply
    12,079.80x = 18,095.40 × 8,143.20
  4. Step 4: Simplify right side
    12,079.80x = 147,354,461.28
  5. Step 5: Solve for x
    x = 147,354,461.28/12,079.80
  6. Step 6: Final answer
    x = 12,198.42

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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.