Home / 31,343.54-47,031.47-20,820.83

Finding the Fourth Proportional to 31,343.54, 47,031.47 and 20,820.83

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Solution

The fourth proportional to 31,343.54, 47,031.47 and 20,820.83 is: 31,241.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,343.54 : 47,031.47 = 20,820.83 : x
  2. Step 2: Convert to fraction form
    31,343.54/47,031.47 = 20,820.83/x
  3. Step 3: Cross multiply
    31,343.54x = 47,031.47 × 20,820.83
  4. Step 4: Simplify right side
    31,343.54x = 979,233,902.26
  5. Step 5: Solve for x
    x = 979,233,902.26/31,343.54
  6. Step 6: Final answer
    x = 31,241.97

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1.5x scale

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.