Home / 39,156.75-54,035.70-21,251.60

Finding the Fourth Proportional to 39,156.75, 54,035.70 and 21,251.60

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Solution

The fourth proportional to 39,156.75, 54,035.70 and 21,251.60 is: 29,326.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,156.75 : 54,035.70 = 21,251.60 : x
  2. Step 2: Convert to fraction form
    39,156.75/54,035.70 = 21,251.60/x
  3. Step 3: Cross multiply
    39,156.75x = 54,035.70 × 21,251.60
  4. Step 4: Simplify right side
    39,156.75x = 1,148,344,811.94
  5. Step 5: Solve for x
    x = 1,148,344,811.94/39,156.75
  6. Step 6: Final answer
    x = 29,326.87

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1.5x scale

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.