Home / 20,729.72-31,094.79-5,147.35

Finding the Fourth Proportional to 20,729.72, 31,094.79 and 5,147.35

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Solution

The fourth proportional to 20,729.72, 31,094.79 and 5,147.35 is: 7,721.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,729.72 : 31,094.79 = 5,147.35 : x
  2. Step 2: Convert to fraction form
    20,729.72/31,094.79 = 5,147.35/x
  3. Step 3: Cross multiply
    20,729.72x = 31,094.79 × 5,147.35
  4. Step 4: Simplify right side
    20,729.72x = 160,055,670.27
  5. Step 5: Solve for x
    x = 160,055,670.27/20,729.72
  6. Step 6: Final answer
    x = 7,721.07

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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.