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Finding the Fourth Proportional to 8,728.66, 12,045.58 and 4,749.78

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Solution

The fourth proportional to 8,728.66, 12,045.58 and 4,749.78 is: 6,554.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,728.66 : 12,045.58 = 4,749.78 : x
  2. Step 2: Convert to fraction form
    8,728.66/12,045.58 = 4,749.78/x
  3. Step 3: Cross multiply
    8,728.66x = 12,045.58 × 4,749.78
  4. Step 4: Simplify right side
    8,728.66x = 57,213,854.97
  5. Step 5: Solve for x
    x = 57,213,854.97/8,728.66
  6. Step 6: Final answer
    x = 6,554.71

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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.