Home / 39,160.70-54,039.92-21,255.56

Finding the Fourth Proportional to 39,160.70, 54,039.92 and 21,255.56

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Solution

The fourth proportional to 39,160.70, 54,039.92 and 21,255.56 is: 29,331.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,160.70 : 54,039.92 = 21,255.56 : x
  2. Step 2: Convert to fraction form
    39,160.70/54,039.92 = 21,255.56/x
  3. Step 3: Cross multiply
    39,160.70x = 54,039.92 × 21,255.56
  4. Step 4: Simplify right side
    39,160.70x = 1,148,648,761.96
  5. Step 5: Solve for x
    x = 1,148,648,761.96/39,160.70
  6. Step 6: Final answer
    x = 29,331.67

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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.