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Finding the Fourth Proportional to 18,861.58, 28,238.91 and 15,673.42

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Solution

The fourth proportional to 18,861.58, 28,238.91 and 15,673.42 is: 23,465.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,861.58 : 28,238.91 = 15,673.42 : x
  2. Step 2: Convert to fraction form
    18,861.58/28,238.91 = 15,673.42/x
  3. Step 3: Cross multiply
    18,861.58x = 28,238.91 × 15,673.42
  4. Step 4: Simplify right side
    18,861.58x = 442,600,296.77
  5. Step 5: Solve for x
    x = 442,600,296.77/18,861.58
  6. Step 6: Final answer
    x = 23,465.71

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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.