Home / 20,799.76-31,234.20-20,638.48

Finding the Fourth Proportional to 20,799.76, 31,234.20 and 20,638.48

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Solution

The fourth proportional to 20,799.76, 31,234.20 and 20,638.48 is: 30,992.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,799.76 : 31,234.20 = 20,638.48 : x
  2. Step 2: Convert to fraction form
    20,799.76/31,234.20 = 20,638.48/x
  3. Step 3: Cross multiply
    20,799.76x = 31,234.20 × 20,638.48
  4. Step 4: Simplify right side
    20,799.76x = 644,626,412.02
  5. Step 5: Solve for x
    x = 644,626,412.02/20,799.76
  6. Step 6: Final answer
    x = 30,992.01

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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.