Home / 20,491.20-28,277.54-11,538.68

Finding the Fourth Proportional to 20,491.20, 28,277.54 and 11,538.68

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Solution

The fourth proportional to 20,491.20, 28,277.54 and 11,538.68 is: 15,923.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,491.20 : 28,277.54 = 11,538.68 : x
  2. Step 2: Convert to fraction form
    20,491.20/28,277.54 = 11,538.68/x
  3. Step 3: Cross multiply
    20,491.20x = 28,277.54 × 11,538.68
  4. Step 4: Simplify right side
    20,491.20x = 326,285,485.25
  5. Step 5: Solve for x
    x = 326,285,485.25/20,491.20
  6. Step 6: Final answer
    x = 15,923.20

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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.