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Finding the Fourth Proportional to 29,187, 40,278.06 and 15,939

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Solution

The fourth proportional to 29,187, 40,278.06 and 15,939 is: 21,995.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,187 : 40,278.06 = 15,939 : x
  2. Step 2: Convert to fraction form
    29,187/40,278.06 = 15,939/x
  3. Step 3: Cross multiply
    29,187x = 40,278.06 × 15,939
  4. Step 4: Simplify right side
    29,187x = 641,991,998.34
  5. Step 5: Solve for x
    x = 641,991,998.34/29,187
  6. Step 6: Final answer
    x = 21,995.82

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.