Home / 20,775.81-28,670.72-11,344.38

Finding the Fourth Proportional to 20,775.81, 28,670.72 and 11,344.38

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Solution

The fourth proportional to 20,775.81, 28,670.72 and 11,344.38 is: 15,655.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,775.81 : 28,670.72 = 11,344.38 : x
  2. Step 2: Convert to fraction form
    20,775.81/28,670.72 = 11,344.38/x
  3. Step 3: Cross multiply
    20,775.81x = 28,670.72 × 11,344.38
  4. Step 4: Simplify right side
    20,775.81x = 325,251,542.55
  5. Step 5: Solve for x
    x = 325,251,542.55/20,775.81
  6. Step 6: Final answer
    x = 15,655.30

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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.