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Finding the Fourth Proportional to 18,428.91, 27,616.93 and 10,515

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Solution

The fourth proportional to 18,428.91, 27,616.93 and 10,515 is: 15,757.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,428.91 : 27,616.93 = 10,515 : x
  2. Step 2: Convert to fraction form
    18,428.91/27,616.93 = 10,515/x
  3. Step 3: Cross multiply
    18,428.91x = 27,616.93 × 10,515
  4. Step 4: Simplify right side
    18,428.91x = 290,392,018.95
  5. Step 5: Solve for x
    x = 290,392,018.95/18,428.91
  6. Step 6: Final answer
    x = 15,757.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.