Home / 20,697.12-28,561.14-11,265.66

Finding the Fourth Proportional to 20,697.12, 28,561.14 and 11,265.66

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Solution

The fourth proportional to 20,697.12, 28,561.14 and 11,265.66 is: 15,546.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,697.12 : 28,561.14 = 11,265.66 : x
  2. Step 2: Convert to fraction form
    20,697.12/28,561.14 = 11,265.66/x
  3. Step 3: Cross multiply
    20,697.12x = 28,561.14 × 11,265.66
  4. Step 4: Simplify right side
    20,697.12x = 321,760,092.45
  5. Step 5: Solve for x
    x = 321,760,092.45/20,697.12
  6. Step 6: Final answer
    x = 15,546.13

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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.