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Finding the Fourth Proportional to 8,407.80, 12,613.23 and 2,860.86

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Solution

The fourth proportional to 8,407.80, 12,613.23 and 2,860.86 is: 4,291.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,407.80 : 12,613.23 = 2,860.86 : x
  2. Step 2: Convert to fraction form
    8,407.80/12,613.23 = 2,860.86/x
  3. Step 3: Cross multiply
    8,407.80x = 12,613.23 × 2,860.86
  4. Step 4: Simplify right side
    8,407.80x = 36,084,685.18
  5. Step 5: Solve for x
    x = 36,084,685.18/8,407.80
  6. Step 6: Final answer
    x = 4,291.81

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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.