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Finding the Fourth Proportional to 8,780.88, 13,131.24 and 6,561.24

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Solution

The fourth proportional to 8,780.88, 13,131.24 and 6,561.24 is: 9,811.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,780.88 : 13,131.24 = 6,561.24 : x
  2. Step 2: Convert to fraction form
    8,780.88/13,131.24 = 6,561.24/x
  3. Step 3: Cross multiply
    8,780.88x = 13,131.24 × 6,561.24
  4. Step 4: Simplify right side
    8,780.88x = 86,157,217.14
  5. Step 5: Solve for x
    x = 86,157,217.14/8,780.88
  6. Step 6: Final answer
    x = 9,811.91

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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.