Home / 8,619.20-12,928.80-6,565.04

Finding the Fourth Proportional to 8,619.20, 12,928.80 and 6,565.04

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Solution

The fourth proportional to 8,619.20, 12,928.80 and 6,565.04 is: 9,847.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,619.20 : 12,928.80 = 6,565.04 : x
  2. Step 2: Convert to fraction form
    8,619.20/12,928.80 = 6,565.04/x
  3. Step 3: Cross multiply
    8,619.20x = 12,928.80 × 6,565.04
  4. Step 4: Simplify right side
    8,619.20x = 84,878,089.15
  5. Step 5: Solve for x
    x = 84,878,089.15/8,619.20
  6. Step 6: Final answer
    x = 9,847.56

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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.