Home / 8,191.68-11,298.42-6,419.76

Finding the Fourth Proportional to 8,191.68, 11,298.42 and 6,419.76

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Solution

The fourth proportional to 8,191.68, 11,298.42 and 6,419.76 is: 8,854.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,191.68 : 11,298.42 = 6,419.76 : x
  2. Step 2: Convert to fraction form
    8,191.68/11,298.42 = 6,419.76/x
  3. Step 3: Cross multiply
    8,191.68x = 11,298.42 × 6,419.76
  4. Step 4: Simplify right side
    8,191.68x = 72,533,144.78
  5. Step 5: Solve for x
    x = 72,533,144.78/8,191.68
  6. Step 6: Final answer
    x = 8,854.49

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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.