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Finding the Fourth Proportional to 18,828.66, 28,243.72 and 5,681.03

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Solution

The fourth proportional to 18,828.66, 28,243.72 and 5,681.03 is: 8,521.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,828.66 : 28,243.72 = 5,681.03 : x
  2. Step 2: Convert to fraction form
    18,828.66/28,243.72 = 5,681.03/x
  3. Step 3: Cross multiply
    18,828.66x = 28,243.72 × 5,681.03
  4. Step 4: Simplify right side
    18,828.66x = 160,453,335.82
  5. Step 5: Solve for x
    x = 160,453,335.82/18,828.66
  6. Step 6: Final answer
    x = 8,521.76

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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.