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Finding the Fourth Proportional to 8,788.89, 12,128.65 and 4,809.97

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Solution

The fourth proportional to 8,788.89, 12,128.65 and 4,809.97 is: 6,637.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,788.89 : 12,128.65 = 4,809.97 : x
  2. Step 2: Convert to fraction form
    8,788.89/12,128.65 = 4,809.97/x
  3. Step 3: Cross multiply
    8,788.89x = 12,128.65 × 4,809.97
  4. Step 4: Simplify right side
    8,788.89x = 58,338,442.64
  5. Step 5: Solve for x
    x = 58,338,442.64/8,788.89
  6. Step 6: Final answer
    x = 6,637.75

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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.