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Finding the Fourth Proportional to 8,899, 12,280.14 and 4,919.88

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Solution

The fourth proportional to 8,899, 12,280.14 and 4,919.88 is: 6,789.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,899 : 12,280.14 = 4,919.88 : x
  2. Step 2: Convert to fraction form
    8,899/12,280.14 = 4,919.88/x
  3. Step 3: Cross multiply
    8,899x = 12,280.14 × 4,919.88
  4. Step 4: Simplify right side
    8,899x = 60,416,815.18
  5. Step 5: Solve for x
    x = 60,416,815.18/8,899
  6. Step 6: Final answer
    x = 6,789.17

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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.