Home / 47,430.72-71,129.30-20,789.64

Finding the Fourth Proportional to 47,430.72, 71,129.30 and 20,789.64

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Solution

The fourth proportional to 47,430.72, 71,129.30 and 20,789.64 is: 31,177.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,430.72 : 71,129.30 = 20,789.64 : x
  2. Step 2: Convert to fraction form
    47,430.72/71,129.30 = 20,789.64/x
  3. Step 3: Cross multiply
    47,430.72x = 71,129.30 × 20,789.64
  4. Step 4: Simplify right side
    47,430.72x = 1,478,752,540.45
  5. Step 5: Solve for x
    x = 1,478,752,540.45/47,430.72
  6. Step 6: Final answer
    x = 31,177.11

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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.