Home / 28,338.23-39,109.52-21,155.68

Finding the Fourth Proportional to 28,338.23, 39,109.52 and 21,155.68

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Solution

The fourth proportional to 28,338.23, 39,109.52 and 21,155.68 is: 29,196.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,338.23 : 39,109.52 = 21,155.68 : x
  2. Step 2: Convert to fraction form
    28,338.23/39,109.52 = 21,155.68/x
  3. Step 3: Cross multiply
    28,338.23x = 39,109.52 × 21,155.68
  4. Step 4: Simplify right side
    28,338.23x = 827,388,591.85
  5. Step 5: Solve for x
    x = 827,388,591.85/28,338.23
  6. Step 6: Final answer
    x = 29,196.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.