Home / 8,209.86-12,312.20-5,398.55

Finding the Fourth Proportional to 8,209.86, 12,312.20 and 5,398.55

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Solution

The fourth proportional to 8,209.86, 12,312.20 and 5,398.55 is: 8,096.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,209.86 : 12,312.20 = 5,398.55 : x
  2. Step 2: Convert to fraction form
    8,209.86/12,312.20 = 5,398.55/x
  3. Step 3: Cross multiply
    8,209.86x = 12,312.20 × 5,398.55
  4. Step 4: Simplify right side
    8,209.86x = 66,468,025.42
  5. Step 5: Solve for x
    x = 66,468,025.42/8,209.86
  6. Step 6: Final answer
    x = 8,096.13

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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.