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Finding the Fourth Proportional to 8,729.61, 12,047.13 and 4,750.47

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Solution

The fourth proportional to 8,729.61, 12,047.13 and 4,750.47 is: 6,555.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,729.61 : 12,047.13 = 4,750.47 : x
  2. Step 2: Convert to fraction form
    8,729.61/12,047.13 = 4,750.47/x
  3. Step 3: Cross multiply
    8,729.61x = 12,047.13 × 4,750.47
  4. Step 4: Simplify right side
    8,729.61x = 57,229,529.65
  5. Step 5: Solve for x
    x = 57,229,529.65/8,729.61
  6. Step 6: Final answer
    x = 6,555.79

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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.