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Finding the Fourth Proportional to 8,124.80, 12,187.20 and 6,180.80

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Solution

The fourth proportional to 8,124.80, 12,187.20 and 6,180.80 is: 9,271.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,124.80 : 12,187.20 = 6,180.80 : x
  2. Step 2: Convert to fraction form
    8,124.80/12,187.20 = 6,180.80/x
  3. Step 3: Cross multiply
    8,124.80x = 12,187.20 × 6,180.80
  4. Step 4: Simplify right side
    8,124.80x = 75,326,645.76
  5. Step 5: Solve for x
    x = 75,326,645.76/8,124.80
  6. Step 6: Final answer
    x = 9,271.20

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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.