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Finding the Fourth Proportional to 8,564.40, 12,832.20 and 5,641.20

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Solution

The fourth proportional to 8,564.40, 12,832.20 and 5,641.20 is: 8,452.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,564.40 : 12,832.20 = 5,641.20 : x
  2. Step 2: Convert to fraction form
    8,564.40/12,832.20 = 5,641.20/x
  3. Step 3: Cross multiply
    8,564.40x = 12,832.20 × 5,641.20
  4. Step 4: Simplify right side
    8,564.40x = 72,389,006.64
  5. Step 5: Solve for x
    x = 72,389,006.64/8,564.40
  6. Step 6: Final answer
    x = 8,452.32

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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.