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Finding the Fourth Proportional to 8,980.34, 13,472.91 and 7,999.88

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Solution

The fourth proportional to 8,980.34, 13,472.91 and 7,999.88 is: 12,001.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,980.34 : 13,472.91 = 7,999.88 : x
  2. Step 2: Convert to fraction form
    8,980.34/13,472.91 = 7,999.88/x
  3. Step 3: Cross multiply
    8,980.34x = 13,472.91 × 7,999.88
  4. Step 4: Simplify right side
    8,980.34x = 107,781,595.89
  5. Step 5: Solve for x
    x = 107,781,595.89/8,980.34
  6. Step 6: Final answer
    x = 12,001.96

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.