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Finding the Fourth Proportional to 8,788.85, 12,128.55 and 4,809.96

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Solution

The fourth proportional to 8,788.85, 12,128.55 and 4,809.96 is: 6,637.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,788.85 : 12,128.55 = 4,809.96 : x
  2. Step 2: Convert to fraction form
    8,788.85/12,128.55 = 4,809.96/x
  3. Step 3: Cross multiply
    8,788.85x = 12,128.55 × 4,809.96
  4. Step 4: Simplify right side
    8,788.85x = 58,337,794.97
  5. Step 5: Solve for x
    x = 58,337,794.97/8,788.85
  6. Step 6: Final answer
    x = 6,637.70

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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.