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Finding the Fourth Proportional to 8,911.20, 13,366.80 and 7,501.80

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Solution

The fourth proportional to 8,911.20, 13,366.80 and 7,501.80 is: 11,252.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,911.20 : 13,366.80 = 7,501.80 : x
  2. Step 2: Convert to fraction form
    8,911.20/13,366.80 = 7,501.80/x
  3. Step 3: Cross multiply
    8,911.20x = 13,366.80 × 7,501.80
  4. Step 4: Simplify right side
    8,911.20x = 100,275,060.24
  5. Step 5: Solve for x
    x = 100,275,060.24/8,911.20
  6. Step 6: Final answer
    x = 11,252.70

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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.