Home / 20,568.84-28,385.08-11,137.38

Finding the Fourth Proportional to 20,568.84, 28,385.08 and 11,137.38

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Solution

The fourth proportional to 20,568.84, 28,385.08 and 11,137.38 is: 15,369.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,568.84 : 28,385.08 = 11,137.38 : x
  2. Step 2: Convert to fraction form
    20,568.84/28,385.08 = 11,137.38/x
  3. Step 3: Cross multiply
    20,568.84x = 28,385.08 × 11,137.38
  4. Step 4: Simplify right side
    20,568.84x = 316,135,422.29
  5. Step 5: Solve for x
    x = 316,135,422.29/20,568.84
  6. Step 6: Final answer
    x = 15,369.63

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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.