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Finding the Fourth Proportional to 18,615.33, 27,925.04 and 8,078.11

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Solution

The fourth proportional to 18,615.33, 27,925.04 and 8,078.11 is: 12,118.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,615.33 : 27,925.04 = 8,078.11 : x
  2. Step 2: Convert to fraction form
    18,615.33/27,925.04 = 8,078.11/x
  3. Step 3: Cross multiply
    18,615.33x = 27,925.04 × 8,078.11
  4. Step 4: Simplify right side
    18,615.33x = 225,581,599.98
  5. Step 5: Solve for x
    x = 225,581,599.98/18,615.33
  6. Step 6: Final answer
    x = 12,118.05

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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.