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Finding the Fourth Proportional to 8,898.86, 12,279.78 and 4,920.02

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Solution

The fourth proportional to 8,898.86, 12,279.78 and 4,920.02 is: 6,789.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,898.86 : 12,279.78 = 4,920.02 : x
  2. Step 2: Convert to fraction form
    8,898.86/12,279.78 = 4,920.02/x
  3. Step 3: Cross multiply
    8,898.86x = 12,279.78 × 4,920.02
  4. Step 4: Simplify right side
    8,898.86x = 60,416,763.20
  5. Step 5: Solve for x
    x = 60,416,763.20/8,898.86
  6. Step 6: Final answer
    x = 6,789.27

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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.