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Finding the Fourth Proportional to 18,351.68, 27,511.29 and 7,957.76

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Solution

The fourth proportional to 18,351.68, 27,511.29 and 7,957.76 is: 11,929.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,351.68 : 27,511.29 = 7,957.76 : x
  2. Step 2: Convert to fraction form
    18,351.68/27,511.29 = 7,957.76/x
  3. Step 3: Cross multiply
    18,351.68x = 27,511.29 × 7,957.76
  4. Step 4: Simplify right side
    18,351.68x = 218,928,243.11
  5. Step 5: Solve for x
    x = 218,928,243.11/18,351.68
  6. Step 6: Final answer
    x = 11,929.60

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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.