Home / 20,491.52-28,275.14-11,538.79

Finding the Fourth Proportional to 20,491.52, 28,275.14 and 11,538.79

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Solution

The fourth proportional to 20,491.52, 28,275.14 and 11,538.79 is: 15,921.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,491.52 : 28,275.14 = 11,538.79 : x
  2. Step 2: Convert to fraction form
    20,491.52/28,275.14 = 11,538.79/x
  3. Step 3: Cross multiply
    20,491.52x = 28,275.14 × 11,538.79
  4. Step 4: Simplify right side
    20,491.52x = 326,260,860.84
  5. Step 5: Solve for x
    x = 326,260,860.84/20,491.52
  6. Step 6: Final answer
    x = 15,921.75

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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.