Home / 5,166.42-7,129.65-2,808.55

Finding the Fourth Proportional to 5,166.42, 7,129.65 and 2,808.55

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Solution

The fourth proportional to 5,166.42, 7,129.65 and 2,808.55 is: 3,875.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,166.42 : 7,129.65 = 2,808.55 : x
  2. Step 2: Convert to fraction form
    5,166.42/7,129.65 = 2,808.55/x
  3. Step 3: Cross multiply
    5,166.42x = 7,129.65 × 2,808.55
  4. Step 4: Simplify right side
    5,166.42x = 20,023,934.15
  5. Step 5: Solve for x
    x = 20,023,934.15/5,166.42
  6. Step 6: Final answer
    x = 3,875.78

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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.