Home / 38,139.72-57,467.67-31,709.40

Finding the Fourth Proportional to 38,139.72, 57,467.67 and 31,709.40

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Solution

The fourth proportional to 38,139.72, 57,467.67 and 31,709.40 is: 47,778.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,139.72 : 57,467.67 = 31,709.40 : x
  2. Step 2: Convert to fraction form
    38,139.72/57,467.67 = 31,709.40/x
  3. Step 3: Cross multiply
    38,139.72x = 57,467.67 × 31,709.40
  4. Step 4: Simplify right side
    38,139.72x = 1,822,265,335.10
  5. Step 5: Solve for x
    x = 1,822,265,335.10/38,139.72
  6. Step 6: Final answer
    x = 47,778.68

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.