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Finding the Fourth Proportional to 13,169.98, 19,737.55 and 7,887.97

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Solution

The fourth proportional to 13,169.98, 19,737.55 and 7,887.97 is: 11,821.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,169.98 : 19,737.55 = 7,887.97 : x
  2. Step 2: Convert to fraction form
    13,169.98/19,737.55 = 7,887.97/x
  3. Step 3: Cross multiply
    13,169.98x = 19,737.55 × 7,887.97
  4. Step 4: Simplify right side
    13,169.98x = 155,689,202.27
  5. Step 5: Solve for x
    x = 155,689,202.27/13,169.98
  6. Step 6: Final answer
    x = 11,821.52

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1.5x scale

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.