Home / 21,989.30-32,921.85-17,115.80

Finding the Fourth Proportional to 21,989.30, 32,921.85 and 17,115.80

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Solution

The fourth proportional to 21,989.30, 32,921.85 and 17,115.80 is: 25,625.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,989.30 : 32,921.85 = 17,115.80 : x
  2. Step 2: Convert to fraction form
    21,989.30/32,921.85 = 17,115.80/x
  3. Step 3: Cross multiply
    21,989.30x = 32,921.85 × 17,115.80
  4. Step 4: Simplify right side
    21,989.30x = 563,483,800.23
  5. Step 5: Solve for x
    x = 563,483,800.23/21,989.30
  6. Step 6: Final answer
    x = 25,625.36

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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.