Home / 20,913.98-31,370.76-5,331.44

Finding the Fourth Proportional to 20,913.98, 31,370.76 and 5,331.44

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Solution

The fourth proportional to 20,913.98, 31,370.76 and 5,331.44 is: 7,997.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,913.98 : 31,370.76 = 5,331.44 : x
  2. Step 2: Convert to fraction form
    20,913.98/31,370.76 = 5,331.44/x
  3. Step 3: Cross multiply
    20,913.98x = 31,370.76 × 5,331.44
  4. Step 4: Simplify right side
    20,913.98x = 167,251,324.69
  5. Step 5: Solve for x
    x = 167,251,324.69/20,913.98
  6. Step 6: Final answer
    x = 7,997.11

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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.