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Finding the Fourth Proportional to 8,559.90, 11,808.27 and 7,378.92

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Solution

The fourth proportional to 8,559.90, 11,808.27 and 7,378.92 is: 10,179.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,559.90 : 11,808.27 = 7,378.92 : x
  2. Step 2: Convert to fraction form
    8,559.90/11,808.27 = 7,378.92/x
  3. Step 3: Cross multiply
    8,559.90x = 11,808.27 × 7,378.92
  4. Step 4: Simplify right side
    8,559.90x = 87,132,279.67
  5. Step 5: Solve for x
    x = 87,132,279.67/8,559.90
  6. Step 6: Final answer
    x = 10,179.12

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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.