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Finding the Fourth Proportional to 20,806.80, 29,168.40 and 20,806.80

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Solution

The fourth proportional to 20,806.80, 29,168.40 and 20,806.80 is: 29,168.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,806.80 : 29,168.40 = 20,806.80 : x
  2. Step 2: Convert to fraction form
    20,806.80/29,168.40 = 20,806.80/x
  3. Step 3: Cross multiply
    20,806.80x = 29,168.40 × 20,806.80
  4. Step 4: Simplify right side
    20,806.80x = 606,901,065.12
  5. Step 5: Solve for x
    x = 606,901,065.12/20,806.80
  6. Step 6: Final answer
    x = 29,168.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.