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Finding the Fourth Proportional to 12,487.01, 17,199.77 and 8,703.42

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Solution

The fourth proportional to 12,487.01, 17,199.77 and 8,703.42 is: 11,988.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,487.01 : 17,199.77 = 8,703.42 : x
  2. Step 2: Convert to fraction form
    12,487.01/17,199.77 = 8,703.42/x
  3. Step 3: Cross multiply
    12,487.01x = 17,199.77 × 8,703.42
  4. Step 4: Simplify right side
    12,487.01x = 149,696,883.80
  5. Step 5: Solve for x
    x = 149,696,883.80/12,487.01
  6. Step 6: Final answer
    x = 11,988.21

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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.