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Finding the Fourth Proportional to 8,709.11, 12,020.46 and 5,354.80

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Solution

The fourth proportional to 8,709.11, 12,020.46 and 5,354.80 is: 7,390.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,709.11 : 12,020.46 = 5,354.80 : x
  2. Step 2: Convert to fraction form
    8,709.11/12,020.46 = 5,354.80/x
  3. Step 3: Cross multiply
    8,709.11x = 12,020.46 × 5,354.80
  4. Step 4: Simplify right side
    8,709.11x = 64,367,159.21
  5. Step 5: Solve for x
    x = 64,367,159.21/8,709.11
  6. Step 6: Final answer
    x = 7,390.78

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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.