Home / 8,958.59-12,359.18-6,121.40

Finding the Fourth Proportional to 8,958.59, 12,359.18 and 6,121.40

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Solution

The fourth proportional to 8,958.59, 12,359.18 and 6,121.40 is: 8,445.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,958.59 : 12,359.18 = 6,121.40 : x
  2. Step 2: Convert to fraction form
    8,958.59/12,359.18 = 6,121.40/x
  3. Step 3: Cross multiply
    8,958.59x = 12,359.18 × 6,121.40
  4. Step 4: Simplify right side
    8,958.59x = 75,655,453.85
  5. Step 5: Solve for x
    x = 75,655,453.85/8,958.59
  6. Step 6: Final answer
    x = 8,445.02

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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.