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Finding the Fourth Proportional to 39,391.87, 59,087.78 and 11,689.87

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Solution

The fourth proportional to 39,391.87, 59,087.78 and 11,689.87 is: 17,534.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,391.87 : 59,087.78 = 11,689.87 : x
  2. Step 2: Convert to fraction form
    39,391.87/59,087.78 = 11,689.87/x
  3. Step 3: Cross multiply
    39,391.87x = 59,087.78 × 11,689.87
  4. Step 4: Simplify right side
    39,391.87x = 690,728,408.34
  5. Step 5: Solve for x
    x = 690,728,408.34/39,391.87
  6. Step 6: Final answer
    x = 17,534.80

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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.