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Finding the Fourth Proportional to 27,939, 38,555.94 and 15,364.68

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Solution

The fourth proportional to 27,939, 38,555.94 and 15,364.68 is: 21,203.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,939 : 38,555.94 = 15,364.68 : x
  2. Step 2: Convert to fraction form
    27,939/38,555.94 = 15,364.68/x
  3. Step 3: Cross multiply
    27,939x = 38,555.94 × 15,364.68
  4. Step 4: Simplify right side
    27,939x = 592,399,680.20
  5. Step 5: Solve for x
    x = 592,399,680.20/27,939
  6. Step 6: Final answer
    x = 21,203.32

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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.