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Finding the Fourth Proportional to 18,561.60, 27,866.16 and 15,945.84

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Solution

The fourth proportional to 18,561.60, 27,866.16 and 15,945.84 is: 23,939.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,561.60 : 27,866.16 = 15,945.84 : x
  2. Step 2: Convert to fraction form
    18,561.60/27,866.16 = 15,945.84/x
  3. Step 3: Cross multiply
    18,561.60x = 27,866.16 × 15,945.84
  4. Step 4: Simplify right side
    18,561.60x = 444,349,328.77
  5. Step 5: Solve for x
    x = 444,349,328.77/18,561.60
  6. Step 6: Final answer
    x = 23,939.17

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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.