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Finding the Fourth Proportional to 27,861.76, 38,448.90 and 15,114.64

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Solution

The fourth proportional to 27,861.76, 38,448.90 and 15,114.64 is: 20,858.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,861.76 : 38,448.90 = 15,114.64 : x
  2. Step 2: Convert to fraction form
    27,861.76/38,448.90 = 15,114.64/x
  3. Step 3: Cross multiply
    27,861.76x = 38,448.90 × 15,114.64
  4. Step 4: Simplify right side
    27,861.76x = 581,141,281.90
  5. Step 5: Solve for x
    x = 581,141,281.90/27,861.76
  6. Step 6: Final answer
    x = 20,858.02

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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.