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Finding the Fourth Proportional to 8,330.80, 11,491.16 and 6,561.68

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Solution

The fourth proportional to 8,330.80, 11,491.16 and 6,561.68 is: 9,050.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,330.80 : 11,491.16 = 6,561.68 : x
  2. Step 2: Convert to fraction form
    8,330.80/11,491.16 = 6,561.68/x
  3. Step 3: Cross multiply
    8,330.80x = 11,491.16 × 6,561.68
  4. Step 4: Simplify right side
    8,330.80x = 75,401,314.75
  5. Step 5: Solve for x
    x = 75,401,314.75/8,330.80
  6. Step 6: Final answer
    x = 9,050.91

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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.