Home / 20,867.29-28,791.72-12,371.40

Finding the Fourth Proportional to 20,867.29, 28,791.72 and 12,371.40

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Solution

The fourth proportional to 20,867.29, 28,791.72 and 12,371.40 is: 17,069.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,867.29 : 28,791.72 = 12,371.40 : x
  2. Step 2: Convert to fraction form
    20,867.29/28,791.72 = 12,371.40/x
  3. Step 3: Cross multiply
    20,867.29x = 28,791.72 × 12,371.40
  4. Step 4: Simplify right side
    20,867.29x = 356,193,884.81
  5. Step 5: Solve for x
    x = 356,193,884.81/20,867.29
  6. Step 6: Final answer
    x = 17,069.48

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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.