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Finding the Fourth Proportional to 8,728.12, 12,044.68 and 4,749.12

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Solution

The fourth proportional to 8,728.12, 12,044.68 and 4,749.12 is: 6,553.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,728.12 : 12,044.68 = 4,749.12 : x
  2. Step 2: Convert to fraction form
    8,728.12/12,044.68 = 4,749.12/x
  3. Step 3: Cross multiply
    8,728.12x = 12,044.68 × 4,749.12
  4. Step 4: Simplify right side
    8,728.12x = 57,201,630.68
  5. Step 5: Solve for x
    x = 57,201,630.68/8,728.12
  6. Step 6: Final answer
    x = 6,553.72

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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.