Home / 20,772.21-28,665.48-11,340.75

Finding the Fourth Proportional to 20,772.21, 28,665.48 and 11,340.75

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Solution

The fourth proportional to 20,772.21, 28,665.48 and 11,340.75 is: 15,650.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,772.21 : 28,665.48 = 11,340.75 : x
  2. Step 2: Convert to fraction form
    20,772.21/28,665.48 = 11,340.75/x
  3. Step 3: Cross multiply
    20,772.21x = 28,665.48 × 11,340.75
  4. Step 4: Simplify right side
    20,772.21x = 325,088,042.31
  5. Step 5: Solve for x
    x = 325,088,042.31/20,772.21
  6. Step 6: Final answer
    x = 15,650.14

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Half scale
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Double scale
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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.