Home / 28,639.92-42,965.80-11,109.68

Finding the Fourth Proportional to 28,639.92, 42,965.80 and 11,109.68

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Solution

The fourth proportional to 28,639.92, 42,965.80 and 11,109.68 is: 16,666.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,639.92 : 42,965.80 = 11,109.68 : x
  2. Step 2: Convert to fraction form
    28,639.92/42,965.80 = 11,109.68/x
  3. Step 3: Cross multiply
    28,639.92x = 42,965.80 × 11,109.68
  4. Step 4: Simplify right side
    28,639.92x = 477,336,288.94
  5. Step 5: Solve for x
    x = 477,336,288.94/28,639.92
  6. Step 6: Final answer
    x = 16,666.82

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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.