Home / 20,973.74-31,438.67-7,820.82

Finding the Fourth Proportional to 20,973.74, 31,438.67 and 7,820.82

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Solution

The fourth proportional to 20,973.74, 31,438.67 and 7,820.82 is: 11,723.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,973.74 : 31,438.67 = 7,820.82 : x
  2. Step 2: Convert to fraction form
    20,973.74/31,438.67 = 7,820.82/x
  3. Step 3: Cross multiply
    20,973.74x = 31,438.67 × 7,820.82
  4. Step 4: Simplify right side
    20,973.74x = 245,876,140.01
  5. Step 5: Solve for x
    x = 245,876,140.01/20,973.74
  6. Step 6: Final answer
    x = 11,723.05

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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.