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Finding the Fourth Proportional to 18,321.51, 27,479.07 and 8,459.94

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Solution

The fourth proportional to 18,321.51, 27,479.07 and 8,459.94 is: 12,688.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,321.51 : 27,479.07 = 8,459.94 : x
  2. Step 2: Convert to fraction form
    18,321.51/27,479.07 = 8,459.94/x
  3. Step 3: Cross multiply
    18,321.51x = 27,479.07 × 8,459.94
  4. Step 4: Simplify right side
    18,321.51x = 232,471,283.46
  5. Step 5: Solve for x
    x = 232,471,283.46/18,321.51
  6. Step 6: Final answer
    x = 12,688.43

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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.