Home / 39,138.72-54,011.45-21,233.72

Finding the Fourth Proportional to 39,138.72, 54,011.45 and 21,233.72

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Solution

The fourth proportional to 39,138.72, 54,011.45 and 21,233.72 is: 29,302.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,138.72 : 54,011.45 = 21,233.72 : x
  2. Step 2: Convert to fraction form
    39,138.72/54,011.45 = 21,233.72/x
  3. Step 3: Cross multiply
    39,138.72x = 54,011.45 × 21,233.72
  4. Step 4: Simplify right side
    39,138.72x = 1,146,864,006.09
  5. Step 5: Solve for x
    x = 1,146,864,006.09/39,138.72
  6. Step 6: Final answer
    x = 29,302.54

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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.