Home / 27,990.30-38,629.34-20,904.42

Finding the Fourth Proportional to 27,990.30, 38,629.34 and 20,904.42

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Solution

The fourth proportional to 27,990.30, 38,629.34 and 20,904.42 is: 28,850.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,990.30 : 38,629.34 = 20,904.42 : x
  2. Step 2: Convert to fraction form
    27,990.30/38,629.34 = 20,904.42/x
  3. Step 3: Cross multiply
    27,990.30x = 38,629.34 × 20,904.42
  4. Step 4: Simplify right side
    27,990.30x = 807,523,650.01
  5. Step 5: Solve for x
    x = 807,523,650.01/27,990.30
  6. Step 6: Final answer
    x = 28,850.13

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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.