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Finding the Fourth Proportional to 27,695.88, 38,220.28 and 15,120.63

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Solution

The fourth proportional to 27,695.88, 38,220.28 and 15,120.63 is: 20,866.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,695.88 : 38,220.28 = 15,120.63 : x
  2. Step 2: Convert to fraction form
    27,695.88/38,220.28 = 15,120.63/x
  3. Step 3: Cross multiply
    27,695.88x = 38,220.28 × 15,120.63
  4. Step 4: Simplify right side
    27,695.88x = 577,914,674.57
  5. Step 5: Solve for x
    x = 577,914,674.57/27,695.88
  6. Step 6: Final answer
    x = 20,866.45

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