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Finding the Fourth Proportional to 18,248.70, 27,369.62 and 7,715.28

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Solution

The fourth proportional to 18,248.70, 27,369.62 and 7,715.28 is: 11,571.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,248.70 : 27,369.62 = 7,715.28 : x
  2. Step 2: Convert to fraction form
    18,248.70/27,369.62 = 7,715.28/x
  3. Step 3: Cross multiply
    18,248.70x = 27,369.62 × 7,715.28
  4. Step 4: Simplify right side
    18,248.70x = 211,164,281.79
  5. Step 5: Solve for x
    x = 211,164,281.79/18,248.70
  6. Step 6: Final answer
    x = 11,571.47

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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.