Home / 9,079.75-12,530.30-6,391.81

Finding the Fourth Proportional to 9,079.75, 12,530.30 and 6,391.81

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Solution

The fourth proportional to 9,079.75, 12,530.30 and 6,391.81 is: 8,820.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,079.75 : 12,530.30 = 6,391.81 : x
  2. Step 2: Convert to fraction form
    9,079.75/12,530.30 = 6,391.81/x
  3. Step 3: Cross multiply
    9,079.75x = 12,530.30 × 6,391.81
  4. Step 4: Simplify right side
    9,079.75x = 80,091,280.55
  5. Step 5: Solve for x
    x = 80,091,280.55/9,079.75
  6. Step 6: Final answer
    x = 8,820.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.