Home / 28,688.80-43,016.64-11,138.14

Finding the Fourth Proportional to 28,688.80, 43,016.64 and 11,138.14

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Solution

The fourth proportional to 28,688.80, 43,016.64 and 11,138.14 is: 16,700.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,688.80 : 43,016.64 = 11,138.14 : x
  2. Step 2: Convert to fraction form
    28,688.80/43,016.64 = 11,138.14/x
  3. Step 3: Cross multiply
    28,688.80x = 43,016.64 × 11,138.14
  4. Step 4: Simplify right side
    28,688.80x = 479,125,358.65
  5. Step 5: Solve for x
    x = 479,125,358.65/28,688.80
  6. Step 6: Final answer
    x = 16,700.78

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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.