Home / 8,079.93-12,109.50-7,872.30

Finding the Fourth Proportional to 8,079.93, 12,109.50 and 7,872.30

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Solution

The fourth proportional to 8,079.93, 12,109.50 and 7,872.30 is: 11,798.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,079.93 : 12,109.50 = 7,872.30 : x
  2. Step 2: Convert to fraction form
    8,079.93/12,109.50 = 7,872.30/x
  3. Step 3: Cross multiply
    8,079.93x = 12,109.50 × 7,872.30
  4. Step 4: Simplify right side
    8,079.93x = 95,329,616.85
  5. Step 5: Solve for x
    x = 95,329,616.85/8,079.93
  6. Step 6: Final answer
    x = 11,798.32

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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.