Home / 8,520.53-12,780.61-2,280.55

Finding the Fourth Proportional to 8,520.53, 12,780.61 and 2,280.55

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Solution

The fourth proportional to 8,520.53, 12,780.61 and 2,280.55 is: 3,420.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,520.53 : 12,780.61 = 2,280.55 : x
  2. Step 2: Convert to fraction form
    8,520.53/12,780.61 = 2,280.55/x
  3. Step 3: Cross multiply
    8,520.53x = 12,780.61 × 2,280.55
  4. Step 4: Simplify right side
    8,520.53x = 29,146,770.65
  5. Step 5: Solve for x
    x = 29,146,770.65/8,520.53
  6. Step 6: Final answer
    x = 3,420.77

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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.