Home / 39,138.86-54,011.14-21,233.73

Finding the Fourth Proportional to 39,138.86, 54,011.14 and 21,233.73

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Solution

The fourth proportional to 39,138.86, 54,011.14 and 21,233.73 is: 29,302.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,138.86 : 54,011.14 = 21,233.73 : x
  2. Step 2: Convert to fraction form
    39,138.86/54,011.14 = 21,233.73/x
  3. Step 3: Cross multiply
    39,138.86x = 54,011.14 × 21,233.73
  4. Step 4: Simplify right side
    39,138.86x = 1,146,858,113.21
  5. Step 5: Solve for x
    x = 1,146,858,113.21/39,138.86
  6. Step 6: Final answer
    x = 29,302.29

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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.