Home / 20,171.12-27,818.36-13,099.76

Finding the Fourth Proportional to 20,171.12, 27,818.36 and 13,099.76

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Solution

The fourth proportional to 20,171.12, 27,818.36 and 13,099.76 is: 18,066.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,171.12 : 27,818.36 = 13,099.76 : x
  2. Step 2: Convert to fraction form
    20,171.12/27,818.36 = 13,099.76/x
  3. Step 3: Cross multiply
    20,171.12x = 27,818.36 × 13,099.76
  4. Step 4: Simplify right side
    20,171.12x = 364,413,839.59
  5. Step 5: Solve for x
    x = 364,413,839.59/20,171.12
  6. Step 6: Final answer
    x = 18,066.12

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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.