Home / 20,662.20-28,515.38-12,707.19

Finding the Fourth Proportional to 20,662.20, 28,515.38 and 12,707.19

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Solution

The fourth proportional to 20,662.20, 28,515.38 and 12,707.19 is: 17,536.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,662.20 : 28,515.38 = 12,707.19 : x
  2. Step 2: Convert to fraction form
    20,662.20/28,515.38 = 12,707.19/x
  3. Step 3: Cross multiply
    20,662.20x = 28,515.38 × 12,707.19
  4. Step 4: Simplify right side
    20,662.20x = 362,350,288.05
  5. Step 5: Solve for x
    x = 362,350,288.05/20,662.20
  6. Step 6: Final answer
    x = 17,536.87

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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.