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Finding the Fourth Proportional to 8,780.14, 12,091.98 and 8,752.78

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Solution

The fourth proportional to 8,780.14, 12,091.98 and 8,752.78 is: 12,054.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,780.14 : 12,091.98 = 8,752.78 : x
  2. Step 2: Convert to fraction form
    8,780.14/12,091.98 = 8,752.78/x
  3. Step 3: Cross multiply
    8,780.14x = 12,091.98 × 8,752.78
  4. Step 4: Simplify right side
    8,780.14x = 105,838,440.70
  5. Step 5: Solve for x
    x = 105,838,440.70/8,780.14
  6. Step 6: Final answer
    x = 12,054.30

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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.