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Finding the Fourth Proportional to 8,891.34, 12,269.70 and 5,353.80

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Solution

The fourth proportional to 8,891.34, 12,269.70 and 5,353.80 is: 7,388.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,891.34 : 12,269.70 = 5,353.80 : x
  2. Step 2: Convert to fraction form
    8,891.34/12,269.70 = 5,353.80/x
  3. Step 3: Cross multiply
    8,891.34x = 12,269.70 × 5,353.80
  4. Step 4: Simplify right side
    8,891.34x = 65,689,519.86
  5. Step 5: Solve for x
    x = 65,689,519.86/8,891.34
  6. Step 6: Final answer
    x = 7,388.03

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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.