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Finding the Fourth Proportional to 27,940, 38,558.28 and 15,364.48

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Solution

The fourth proportional to 27,940, 38,558.28 and 15,364.48 is: 21,203.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,940 : 38,558.28 = 15,364.48 : x
  2. Step 2: Convert to fraction form
    27,940/38,558.28 = 15,364.48/x
  3. Step 3: Cross multiply
    27,940x = 38,558.28 × 15,364.48
  4. Step 4: Simplify right side
    27,940x = 592,427,921.89
  5. Step 5: Solve for x
    x = 592,427,921.89/27,940
  6. Step 6: Final answer
    x = 21,203.58

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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.