Home / 20,910.18-28,849.01-13,360.92

Finding the Fourth Proportional to 20,910.18, 28,849.01 and 13,360.92

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Solution

The fourth proportional to 20,910.18, 28,849.01 and 13,360.92 is: 18,433.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,910.18 : 28,849.01 = 13,360.92 : x
  2. Step 2: Convert to fraction form
    20,910.18/28,849.01 = 13,360.92/x
  3. Step 3: Cross multiply
    20,910.18x = 28,849.01 × 13,360.92
  4. Step 4: Simplify right side
    20,910.18x = 385,449,247.88
  5. Step 5: Solve for x
    x = 385,449,247.88/20,910.18
  6. Step 6: Final answer
    x = 18,433.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.