Home / 20,468.78-28,242.64-11,969.24

Finding the Fourth Proportional to 20,468.78, 28,242.64 and 11,969.24

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Solution

The fourth proportional to 20,468.78, 28,242.64 and 11,969.24 is: 16,515.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,468.78 : 28,242.64 = 11,969.24 : x
  2. Step 2: Convert to fraction form
    20,468.78/28,242.64 = 11,969.24/x
  3. Step 3: Cross multiply
    20,468.78x = 28,242.64 × 11,969.24
  4. Step 4: Simplify right side
    20,468.78x = 338,042,936.39
  5. Step 5: Solve for x
    x = 338,042,936.39/20,468.78
  6. Step 6: Final answer
    x = 16,515.05

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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.