Home / 20,685.75-31,029.26-5,103.38

Finding the Fourth Proportional to 20,685.75, 31,029.26 and 5,103.38

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Solution

The fourth proportional to 20,685.75, 31,029.26 and 5,103.38 is: 7,655.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,685.75 : 31,029.26 = 5,103.38 : x
  2. Step 2: Convert to fraction form
    20,685.75/31,029.26 = 5,103.38/x
  3. Step 3: Cross multiply
    20,685.75x = 31,029.26 × 5,103.38
  4. Step 4: Simplify right side
    20,685.75x = 158,353,924.24
  5. Step 5: Solve for x
    x = 158,353,924.24/20,685.75
  6. Step 6: Final answer
    x = 7,655.22

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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.