Home / 21,803.08-30,091.68-13,307.04

Finding the Fourth Proportional to 21,803.08, 30,091.68 and 13,307.04

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Solution

The fourth proportional to 21,803.08, 30,091.68 and 13,307.04 is: 18,365.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,803.08 : 30,091.68 = 13,307.04 : x
  2. Step 2: Convert to fraction form
    21,803.08/30,091.68 = 13,307.04/x
  3. Step 3: Cross multiply
    21,803.08x = 30,091.68 × 13,307.04
  4. Step 4: Simplify right side
    21,803.08x = 400,431,189.43
  5. Step 5: Solve for x
    x = 400,431,189.43/21,803.08
  6. Step 6: Final answer
    x = 18,365.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.