Home / 20,797.29-28,701.42-13,718.70

Finding the Fourth Proportional to 20,797.29, 28,701.42 and 13,718.70

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Solution

The fourth proportional to 20,797.29, 28,701.42 and 13,718.70 is: 18,932.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,797.29 : 28,701.42 = 13,718.70 : x
  2. Step 2: Convert to fraction form
    20,797.29/28,701.42 = 13,718.70/x
  3. Step 3: Cross multiply
    20,797.29x = 28,701.42 × 13,718.70
  4. Step 4: Simplify right side
    20,797.29x = 393,745,958.45
  5. Step 5: Solve for x
    x = 393,745,958.45/20,797.29
  6. Step 6: Final answer
    x = 18,932.57

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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.