Home / 28,775.28-39,716-19,338.37

Finding the Fourth Proportional to 28,775.28, 39,716 and 19,338.37

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Solution

The fourth proportional to 28,775.28, 39,716 and 19,338.37 is: 26,691.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,775.28 : 39,716 = 19,338.37 : x
  2. Step 2: Convert to fraction form
    28,775.28/39,716 = 19,338.37/x
  3. Step 3: Cross multiply
    28,775.28x = 39,716 × 19,338.37
  4. Step 4: Simplify right side
    28,775.28x = 768,042,702.92
  5. Step 5: Solve for x
    x = 768,042,702.92/28,775.28
  6. Step 6: Final answer
    x = 26,691.06

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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.