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Finding the Fourth Proportional to 8,652.80, 12,979.20 and 5,369.60

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Solution

The fourth proportional to 8,652.80, 12,979.20 and 5,369.60 is: 8,054.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,652.80 : 12,979.20 = 5,369.60 : x
  2. Step 2: Convert to fraction form
    8,652.80/12,979.20 = 5,369.60/x
  3. Step 3: Cross multiply
    8,652.80x = 12,979.20 × 5,369.60
  4. Step 4: Simplify right side
    8,652.80x = 69,693,112.32
  5. Step 5: Solve for x
    x = 69,693,112.32/8,652.80
  6. Step 6: Final answer
    x = 8,054.40

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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.