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Finding the Fourth Proportional to 8,898.30, 12,278.57 and 4,918.86

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Solution

The fourth proportional to 8,898.30, 12,278.57 and 4,918.86 is: 6,787.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,898.30 : 12,278.57 = 4,918.86 : x
  2. Step 2: Convert to fraction form
    8,898.30/12,278.57 = 4,918.86/x
  3. Step 3: Cross multiply
    8,898.30x = 12,278.57 × 4,918.86
  4. Step 4: Simplify right side
    8,898.30x = 60,396,542.24
  5. Step 5: Solve for x
    x = 60,396,542.24/8,898.30
  6. Step 6: Final answer
    x = 6,787.42

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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.