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Finding the Fourth Proportional to 18,628, 27,946.32 and 13,424.56

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Solution

The fourth proportional to 18,628, 27,946.32 and 13,424.56 is: 20,139.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,628 : 27,946.32 = 13,424.56 : x
  2. Step 2: Convert to fraction form
    18,628/27,946.32 = 13,424.56/x
  3. Step 3: Cross multiply
    18,628x = 27,946.32 × 13,424.56
  4. Step 4: Simplify right side
    18,628x = 375,167,049.62
  5. Step 5: Solve for x
    x = 375,167,049.62/18,628
  6. Step 6: Final answer
    x = 20,139.95

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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.