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Finding the Fourth Proportional to 8,708.80, 12,018 and 4,729.86

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Solution

The fourth proportional to 8,708.80, 12,018 and 4,729.86 is: 6,527.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,708.80 : 12,018 = 4,729.86 : x
  2. Step 2: Convert to fraction form
    8,708.80/12,018 = 4,729.86/x
  3. Step 3: Cross multiply
    8,708.80x = 12,018 × 4,729.86
  4. Step 4: Simplify right side
    8,708.80x = 56,843,457.48
  5. Step 5: Solve for x
    x = 56,843,457.48/8,708.80
  6. Step 6: Final answer
    x = 6,527.13

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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.