Home / 21,728.81-32,538.09-18,209.57

Finding the Fourth Proportional to 21,728.81, 32,538.09 and 18,209.57

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Solution

The fourth proportional to 21,728.81, 32,538.09 and 18,209.57 is: 27,268.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,728.81 : 32,538.09 = 18,209.57 : x
  2. Step 2: Convert to fraction form
    21,728.81/32,538.09 = 18,209.57/x
  3. Step 3: Cross multiply
    21,728.81x = 32,538.09 × 18,209.57
  4. Step 4: Simplify right side
    21,728.81x = 592,504,373.78
  5. Step 5: Solve for x
    x = 592,504,373.78/21,728.81
  6. Step 6: Final answer
    x = 27,268.14

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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.