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Finding the Fourth Proportional to 18,954.69, 28,373.72 and 12,366.69

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Solution

The fourth proportional to 18,954.69, 28,373.72 and 12,366.69 is: 18,511.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,954.69 : 28,373.72 = 12,366.69 : x
  2. Step 2: Convert to fraction form
    18,954.69/28,373.72 = 12,366.69/x
  3. Step 3: Cross multiply
    18,954.69x = 28,373.72 × 12,366.69
  4. Step 4: Simplify right side
    18,954.69x = 350,888,937.55
  5. Step 5: Solve for x
    x = 350,888,937.55/18,954.69
  6. Step 6: Final answer
    x = 18,511.99

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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.