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Finding the Fourth Proportional to 13,759.50, 18,988.11 and 7,472.01

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Solution

The fourth proportional to 13,759.50, 18,988.11 and 7,472.01 is: 10,311.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,759.50 : 18,988.11 = 7,472.01 : x
  2. Step 2: Convert to fraction form
    13,759.50/18,988.11 = 7,472.01/x
  3. Step 3: Cross multiply
    13,759.50x = 18,988.11 × 7,472.01
  4. Step 4: Simplify right side
    13,759.50x = 141,879,347.80
  5. Step 5: Solve for x
    x = 141,879,347.80/13,759.50
  6. Step 6: Final answer
    x = 10,311.37

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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.