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Finding the Fourth Proportional to 8,654.48, 12,980.32 and 3,107.68

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Solution

The fourth proportional to 8,654.48, 12,980.32 and 3,107.68 is: 4,661.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,654.48 : 12,980.32 = 3,107.68 : x
  2. Step 2: Convert to fraction form
    8,654.48/12,980.32 = 3,107.68/x
  3. Step 3: Cross multiply
    8,654.48x = 12,980.32 × 3,107.68
  4. Step 4: Simplify right side
    8,654.48x = 40,338,680.86
  5. Step 5: Solve for x
    x = 40,338,680.86/8,654.48
  6. Step 6: Final answer
    x = 4,661.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.