Home / 21,388.85-32,003.81-13,454.31

Finding the Fourth Proportional to 21,388.85, 32,003.81 and 13,454.31

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Solution

The fourth proportional to 21,388.85, 32,003.81 and 13,454.31 is: 20,131.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,388.85 : 32,003.81 = 13,454.31 : x
  2. Step 2: Convert to fraction form
    21,388.85/32,003.81 = 13,454.31/x
  3. Step 3: Cross multiply
    21,388.85x = 32,003.81 × 13,454.31
  4. Step 4: Simplify right side
    21,388.85x = 430,589,180.92
  5. Step 5: Solve for x
    x = 430,589,180.92/21,388.85
  6. Step 6: Final answer
    x = 20,131.48

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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.