Home / 27,928.47-38,541.02-20,790.30

Finding the Fourth Proportional to 27,928.47, 38,541.02 and 20,790.30

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Solution

The fourth proportional to 27,928.47, 38,541.02 and 20,790.30 is: 28,690.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,928.47 : 38,541.02 = 20,790.30 : x
  2. Step 2: Convert to fraction form
    27,928.47/38,541.02 = 20,790.30/x
  3. Step 3: Cross multiply
    27,928.47x = 38,541.02 × 20,790.30
  4. Step 4: Simplify right side
    27,928.47x = 801,279,408.68
  5. Step 5: Solve for x
    x = 801,279,408.68/27,928.47
  6. Step 6: Final answer
    x = 28,690.42

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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.