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Finding the Fourth Proportional to 18,593.82, 28,018.71 and 15,379.20

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Solution

The fourth proportional to 18,593.82, 28,018.71 and 15,379.20 is: 23,174.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,593.82 : 28,018.71 = 15,379.20 : x
  2. Step 2: Convert to fraction form
    18,593.82/28,018.71 = 15,379.20/x
  3. Step 3: Cross multiply
    18,593.82x = 28,018.71 × 15,379.20
  4. Step 4: Simplify right side
    18,593.82x = 430,905,344.83
  5. Step 5: Solve for x
    x = 430,905,344.83/18,593.82
  6. Step 6: Final answer
    x = 23,174.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.