Home / 20,939.72-31,410.66-5,357.48

Finding the Fourth Proportional to 20,939.72, 31,410.66 and 5,357.48

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Solution

The fourth proportional to 20,939.72, 31,410.66 and 5,357.48 is: 8,036.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,939.72 : 31,410.66 = 5,357.48 : x
  2. Step 2: Convert to fraction form
    20,939.72/31,410.66 = 5,357.48/x
  3. Step 3: Cross multiply
    20,939.72x = 31,410.66 × 5,357.48
  4. Step 4: Simplify right side
    20,939.72x = 168,281,982.74
  5. Step 5: Solve for x
    x = 168,281,982.74/20,939.72
  6. Step 6: Final answer
    x = 8,036.50

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.