Home / 21,625.14-32,420.43-9,321.78

Finding the Fourth Proportional to 21,625.14, 32,420.43 and 9,321.78

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Solution

The fourth proportional to 21,625.14, 32,420.43 and 9,321.78 is: 13,975.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,625.14 : 32,420.43 = 9,321.78 : x
  2. Step 2: Convert to fraction form
    21,625.14/32,420.43 = 9,321.78/x
  3. Step 3: Cross multiply
    21,625.14x = 32,420.43 × 9,321.78
  4. Step 4: Simplify right side
    21,625.14x = 302,216,115.97
  5. Step 5: Solve for x
    x = 302,216,115.97/21,625.14
  6. Step 6: Final answer
    x = 13,975.22

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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.