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Finding the Fourth Proportional to 8,813.80, 12,159.69 and 5,627.22

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Solution

The fourth proportional to 8,813.80, 12,159.69 and 5,627.22 is: 7,763.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,813.80 : 12,159.69 = 5,627.22 : x
  2. Step 2: Convert to fraction form
    8,813.80/12,159.69 = 5,627.22/x
  3. Step 3: Cross multiply
    8,813.80x = 12,159.69 × 5,627.22
  4. Step 4: Simplify right side
    8,813.80x = 68,425,189.96
  5. Step 5: Solve for x
    x = 68,425,189.96/8,813.80
  6. Step 6: Final answer
    x = 7,763.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.