Home / 8,108.86-12,159.78-3,430.96

Finding the Fourth Proportional to 8,108.86, 12,159.78 and 3,430.96

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Solution

The fourth proportional to 8,108.86, 12,159.78 and 3,430.96 is: 5,144.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,108.86 : 12,159.78 = 3,430.96 : x
  2. Step 2: Convert to fraction form
    8,108.86/12,159.78 = 3,430.96/x
  3. Step 3: Cross multiply
    8,108.86x = 12,159.78 × 3,430.96
  4. Step 4: Simplify right side
    8,108.86x = 41,719,718.79
  5. Step 5: Solve for x
    x = 41,719,718.79/8,108.86
  6. Step 6: Final answer
    x = 5,144.95

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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.