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Finding the Fourth Proportional to 8,708.72, 12,018.04 and 4,729.79

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Solution

The fourth proportional to 8,708.72, 12,018.04 and 4,729.79 is: 6,527.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,708.72 : 12,018.04 = 4,729.79 : x
  2. Step 2: Convert to fraction form
    8,708.72/12,018.04 = 4,729.79/x
  3. Step 3: Cross multiply
    8,708.72x = 12,018.04 × 4,729.79
  4. Step 4: Simplify right side
    8,708.72x = 56,842,823.63
  5. Step 5: Solve for x
    x = 56,842,823.63/8,708.72
  6. Step 6: Final answer
    x = 6,527.12

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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.