Home / 21,716.40-32,542.20-18,411.60

Finding the Fourth Proportional to 21,716.40, 32,542.20 and 18,411.60

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Solution

The fourth proportional to 21,716.40, 32,542.20 and 18,411.60 is: 27,589.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,716.40 : 32,542.20 = 18,411.60 : x
  2. Step 2: Convert to fraction form
    21,716.40/32,542.20 = 18,411.60/x
  3. Step 3: Cross multiply
    21,716.40x = 32,542.20 × 18,411.60
  4. Step 4: Simplify right side
    21,716.40x = 599,153,969.52
  5. Step 5: Solve for x
    x = 599,153,969.52/21,716.40
  6. Step 6: Final answer
    x = 27,589.93

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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.