Home / 28,516.68-42,778.71-10,991.52

Finding the Fourth Proportional to 28,516.68, 42,778.71 and 10,991.52

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Solution

The fourth proportional to 28,516.68, 42,778.71 and 10,991.52 is: 16,488.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,516.68 : 42,778.71 = 10,991.52 : x
  2. Step 2: Convert to fraction form
    28,516.68/42,778.71 = 10,991.52/x
  3. Step 3: Cross multiply
    28,516.68x = 42,778.71 × 10,991.52
  4. Step 4: Simplify right side
    28,516.68x = 470,203,046.54
  5. Step 5: Solve for x
    x = 470,203,046.54/28,516.68
  6. Step 6: Final answer
    x = 16,488.70

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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.