Home / 21,420.57-32,131.92-5,625.68

Finding the Fourth Proportional to 21,420.57, 32,131.92 and 5,625.68

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Solution

The fourth proportional to 21,420.57, 32,131.92 and 5,625.68 is: 8,438.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,420.57 : 32,131.92 = 5,625.68 : x
  2. Step 2: Convert to fraction form
    21,420.57/32,131.92 = 5,625.68/x
  3. Step 3: Cross multiply
    21,420.57x = 32,131.92 × 5,625.68
  4. Step 4: Simplify right side
    21,420.57x = 180,763,739.05
  5. Step 5: Solve for x
    x = 180,763,739.05/21,420.57
  6. Step 6: Final answer
    x = 8,438.79

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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.