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Finding the Fourth Proportional to 8,898.75, 12,280.07 and 4,919.90

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Solution

The fourth proportional to 8,898.75, 12,280.07 and 4,919.90 is: 6,789.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,898.75 : 12,280.07 = 4,919.90 : x
  2. Step 2: Convert to fraction form
    8,898.75/12,280.07 = 4,919.90/x
  3. Step 3: Cross multiply
    8,898.75x = 12,280.07 × 4,919.90
  4. Step 4: Simplify right side
    8,898.75x = 60,416,667.29
  5. Step 5: Solve for x
    x = 60,416,667.29/8,898.75
  6. Step 6: Final answer
    x = 6,789.34

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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.