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Finding the Fourth Proportional to 8,778.81, 12,114.70 and 4,799.86

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Solution

The fourth proportional to 8,778.81, 12,114.70 and 4,799.86 is: 6,623.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,778.81 : 12,114.70 = 4,799.86 : x
  2. Step 2: Convert to fraction form
    8,778.81/12,114.70 = 4,799.86/x
  3. Step 3: Cross multiply
    8,778.81x = 12,114.70 × 4,799.86
  4. Step 4: Simplify right side
    8,778.81x = 58,148,821.66
  5. Step 5: Solve for x
    x = 58,148,821.66/8,778.81
  6. Step 6: Final answer
    x = 6,623.77

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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.