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Finding the Fourth Proportional to 8,425.42, 12,641.77 and 2,879.55

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Solution

The fourth proportional to 8,425.42, 12,641.77 and 2,879.55 is: 4,320.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,425.42 : 12,641.77 = 2,879.55 : x
  2. Step 2: Convert to fraction form
    8,425.42/12,641.77 = 2,879.55/x
  3. Step 3: Cross multiply
    8,425.42x = 12,641.77 × 2,879.55
  4. Step 4: Simplify right side
    8,425.42x = 36,402,612.40
  5. Step 5: Solve for x
    x = 36,402,612.40/8,425.42
  6. Step 6: Final answer
    x = 4,320.57

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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.