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Finding the Fourth Proportional to 8,145.60, 12,208.80 and 6,091.20

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Solution

The fourth proportional to 8,145.60, 12,208.80 and 6,091.20 is: 9,129.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,145.60 : 12,208.80 = 6,091.20 : x
  2. Step 2: Convert to fraction form
    8,145.60/12,208.80 = 6,091.20/x
  3. Step 3: Cross multiply
    8,145.60x = 12,208.80 × 6,091.20
  4. Step 4: Simplify right side
    8,145.60x = 74,366,242.56
  5. Step 5: Solve for x
    x = 74,366,242.56/8,145.60
  6. Step 6: Final answer
    x = 9,129.62

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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.