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Finding the Fourth Proportional to 18,491.28, 27,731.52 and 7,394.40

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Solution

The fourth proportional to 18,491.28, 27,731.52 and 7,394.40 is: 11,089.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,491.28 : 27,731.52 = 7,394.40 : x
  2. Step 2: Convert to fraction form
    18,491.28/27,731.52 = 7,394.40/x
  3. Step 3: Cross multiply
    18,491.28x = 27,731.52 × 7,394.40
  4. Step 4: Simplify right side
    18,491.28x = 205,057,951.49
  5. Step 5: Solve for x
    x = 205,057,951.49/18,491.28
  6. Step 6: Final answer
    x = 11,089.44

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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.