Home / 18,811.42-28,217.32-7,710.36

Finding the Fourth Proportional to 18,811.42, 28,217.32 and 7,710.36

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Solution

The fourth proportional to 18,811.42, 28,217.32 and 7,710.36 is: 11,565.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,811.42 : 28,217.32 = 7,710.36 : x
  2. Step 2: Convert to fraction form
    18,811.42/28,217.32 = 7,710.36/x
  3. Step 3: Cross multiply
    18,811.42x = 28,217.32 × 7,710.36
  4. Step 4: Simplify right side
    18,811.42x = 217,565,695.44
  5. Step 5: Solve for x
    x = 217,565,695.44/18,811.42
  6. Step 6: Final answer
    x = 11,565.62

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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.