Home / 20,505.14-28,296.96-11,555.52

Finding the Fourth Proportional to 20,505.14, 28,296.96 and 11,555.52

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Solution

The fourth proportional to 20,505.14, 28,296.96 and 11,555.52 is: 15,946.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,505.14 : 28,296.96 = 11,555.52 : x
  2. Step 2: Convert to fraction form
    20,505.14/28,296.96 = 11,555.52/x
  3. Step 3: Cross multiply
    20,505.14x = 28,296.96 × 11,555.52
  4. Step 4: Simplify right side
    20,505.14x = 326,986,087.22
  5. Step 5: Solve for x
    x = 326,986,087.22/20,505.14
  6. Step 6: Final answer
    x = 15,946.54

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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.