Home / 20,775.80-28,670.70-11,344.56

Finding the Fourth Proportional to 20,775.80, 28,670.70 and 11,344.56

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Solution

The fourth proportional to 20,775.80, 28,670.70 and 11,344.56 is: 15,655.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,775.80 : 28,670.70 = 11,344.56 : x
  2. Step 2: Convert to fraction form
    20,775.80/28,670.70 = 11,344.56/x
  3. Step 3: Cross multiply
    20,775.80x = 28,670.70 × 11,344.56
  4. Step 4: Simplify right side
    20,775.80x = 325,256,476.39
  5. Step 5: Solve for x
    x = 325,256,476.39/20,775.80
  6. Step 6: Final answer
    x = 15,655.55

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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.