Home / 8,561.20-12,849.90-5,280.70

Finding the Fourth Proportional to 8,561.20, 12,849.90 and 5,280.70

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Solution

The fourth proportional to 8,561.20, 12,849.90 and 5,280.70 is: 7,926.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,561.20 : 12,849.90 = 5,280.70 : x
  2. Step 2: Convert to fraction form
    8,561.20/12,849.90 = 5,280.70/x
  3. Step 3: Cross multiply
    8,561.20x = 12,849.90 × 5,280.70
  4. Step 4: Simplify right side
    8,561.20x = 67,856,466.93
  5. Step 5: Solve for x
    x = 67,856,466.93/8,561.20
  6. Step 6: Final answer
    x = 7,926.05

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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.