Home / 20,973.72-31,452.38-7,818.92

Finding the Fourth Proportional to 20,973.72, 31,452.38 and 7,818.92

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Solution

The fourth proportional to 20,973.72, 31,452.38 and 7,818.92 is: 11,725.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,973.72 : 31,452.38 = 7,818.92 : x
  2. Step 2: Convert to fraction form
    20,973.72/31,452.38 = 7,818.92/x
  3. Step 3: Cross multiply
    20,973.72x = 31,452.38 × 7,818.92
  4. Step 4: Simplify right side
    20,973.72x = 245,923,643.03
  5. Step 5: Solve for x
    x = 245,923,643.03/20,973.72
  6. Step 6: Final answer
    x = 11,725.32

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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.