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Finding the Fourth Proportional to 13,988.73, 20,981.02 and 5,101.98

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Solution

The fourth proportional to 13,988.73, 20,981.02 and 5,101.98 is: 7,652.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,988.73 : 20,981.02 = 5,101.98 : x
  2. Step 2: Convert to fraction form
    13,988.73/20,981.02 = 5,101.98/x
  3. Step 3: Cross multiply
    13,988.73x = 20,981.02 × 5,101.98
  4. Step 4: Simplify right side
    13,988.73x = 107,044,672.12
  5. Step 5: Solve for x
    x = 107,044,672.12/13,988.73
  6. Step 6: Final answer
    x = 7,652.21

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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.