Home / 18,905.41-28,358.21-7,660.97

Finding the Fourth Proportional to 18,905.41, 28,358.21 and 7,660.97

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Solution

The fourth proportional to 18,905.41, 28,358.21 and 7,660.97 is: 11,491.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,905.41 : 28,358.21 = 7,660.97 : x
  2. Step 2: Convert to fraction form
    18,905.41/28,358.21 = 7,660.97/x
  3. Step 3: Cross multiply
    18,905.41x = 28,358.21 × 7,660.97
  4. Step 4: Simplify right side
    18,905.41x = 217,251,396.06
  5. Step 5: Solve for x
    x = 217,251,396.06/18,905.41
  6. Step 6: Final answer
    x = 11,491.49

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.