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Finding the Fourth Proportional to 8,687.34, 11,988.48 and 4,910.46

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Solution

The fourth proportional to 8,687.34, 11,988.48 and 4,910.46 is: 6,776.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,687.34 : 11,988.48 = 4,910.46 : x
  2. Step 2: Convert to fraction form
    8,687.34/11,988.48 = 4,910.46/x
  3. Step 3: Cross multiply
    8,687.34x = 11,988.48 × 4,910.46
  4. Step 4: Simplify right side
    8,687.34x = 58,868,951.50
  5. Step 5: Solve for x
    x = 58,868,951.50/8,687.34
  6. Step 6: Final answer
    x = 6,776.41

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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.