Home / 8,280.38-12,420.57-2,124.38

Finding the Fourth Proportional to 8,280.38, 12,420.57 and 2,124.38

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Solution

The fourth proportional to 8,280.38, 12,420.57 and 2,124.38 is: 3,186.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,280.38 : 12,420.57 = 2,124.38 : x
  2. Step 2: Convert to fraction form
    8,280.38/12,420.57 = 2,124.38/x
  3. Step 3: Cross multiply
    8,280.38x = 12,420.57 × 2,124.38
  4. Step 4: Simplify right side
    8,280.38x = 26,385,948.39
  5. Step 5: Solve for x
    x = 26,385,948.39/8,280.38
  6. Step 6: Final answer
    x = 3,186.56

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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.