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Finding the Fourth Proportional to 11,490.80, 15,867.16 and 11,119.28

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Solution

The fourth proportional to 11,490.80, 15,867.16 and 11,119.28 is: 15,354.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,490.80 : 15,867.16 = 11,119.28 : x
  2. Step 2: Convert to fraction form
    11,490.80/15,867.16 = 11,119.28/x
  3. Step 3: Cross multiply
    11,490.80x = 15,867.16 × 11,119.28
  4. Step 4: Simplify right side
    11,490.80x = 176,431,394.84
  5. Step 5: Solve for x
    x = 176,431,394.84/11,490.80
  6. Step 6: Final answer
    x = 15,354.14

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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.