Home / 18,748.70-28,109.05-11,351.38

Finding the Fourth Proportional to 18,748.70, 28,109.05 and 11,351.38

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Solution

The fourth proportional to 18,748.70, 28,109.05 and 11,351.38 is: 17,018.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,748.70 : 28,109.05 = 11,351.38 : x
  2. Step 2: Convert to fraction form
    18,748.70/28,109.05 = 11,351.38/x
  3. Step 3: Cross multiply
    18,748.70x = 28,109.05 × 11,351.38
  4. Step 4: Simplify right side
    18,748.70x = 319,076,507.99
  5. Step 5: Solve for x
    x = 319,076,507.99/18,748.70
  6. Step 6: Final answer
    x = 17,018.59

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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.