Home / 20,689.38-28,551.41-11,257.95

Finding the Fourth Proportional to 20,689.38, 28,551.41 and 11,257.95

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Solution

The fourth proportional to 20,689.38, 28,551.41 and 11,257.95 is: 15,536.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,689.38 : 28,551.41 = 11,257.95 : x
  2. Step 2: Convert to fraction form
    20,689.38/28,551.41 = 11,257.95/x
  3. Step 3: Cross multiply
    20,689.38x = 28,551.41 × 11,257.95
  4. Step 4: Simplify right side
    20,689.38x = 321,430,346.21
  5. Step 5: Solve for x
    x = 321,430,346.21/20,689.38
  6. Step 6: Final answer
    x = 15,536.01

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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.