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Finding the Fourth Proportional to 27,965.64, 38,592.50 and 15,390.38

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Solution

The fourth proportional to 27,965.64, 38,592.50 and 15,390.38 is: 21,238.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,965.64 : 38,592.50 = 15,390.38 : x
  2. Step 2: Convert to fraction form
    27,965.64/38,592.50 = 15,390.38/x
  3. Step 3: Cross multiply
    27,965.64x = 38,592.50 × 15,390.38
  4. Step 4: Simplify right side
    27,965.64x = 593,953,240.15
  5. Step 5: Solve for x
    x = 593,953,240.15/27,965.64
  6. Step 6: Final answer
    x = 21,238.68

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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.