Home / 12,340.15-18,516.30-7,079.20

Finding the Fourth Proportional to 12,340.15, 18,516.30 and 7,079.20

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Solution

The fourth proportional to 12,340.15, 18,516.30 and 7,079.20 is: 10,622.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,340.15 : 18,516.30 = 7,079.20 : x
  2. Step 2: Convert to fraction form
    12,340.15/18,516.30 = 7,079.20/x
  3. Step 3: Cross multiply
    12,340.15x = 18,516.30 × 7,079.20
  4. Step 4: Simplify right side
    12,340.15x = 131,080,590.96
  5. Step 5: Solve for x
    x = 131,080,590.96/12,340.15
  6. Step 6: Final answer
    x = 10,622.29

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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.