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Finding the Fourth Proportional to 18,806.60, 28,230.42 and 13,860.92

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Solution

The fourth proportional to 18,806.60, 28,230.42 and 13,860.92 is: 20,806.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,806.60 : 28,230.42 = 13,860.92 : x
  2. Step 2: Convert to fraction form
    18,806.60/28,230.42 = 13,860.92/x
  3. Step 3: Cross multiply
    18,806.60x = 28,230.42 × 13,860.92
  4. Step 4: Simplify right side
    18,806.60x = 391,299,593.19
  5. Step 5: Solve for x
    x = 391,299,593.19/18,806.60
  6. Step 6: Final answer
    x = 20,806.50

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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.