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Finding the Fourth Proportional to 8,707.98, 11,989.70 and 7,684.88

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Solution

The fourth proportional to 8,707.98, 11,989.70 and 7,684.88 is: 10,581.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,707.98 : 11,989.70 = 7,684.88 : x
  2. Step 2: Convert to fraction form
    8,707.98/11,989.70 = 7,684.88/x
  3. Step 3: Cross multiply
    8,707.98x = 11,989.70 × 7,684.88
  4. Step 4: Simplify right side
    8,707.98x = 92,139,397.29
  5. Step 5: Solve for x
    x = 92,139,397.29/8,707.98
  6. Step 6: Final answer
    x = 10,581.03

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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.