Home / 28,249.49-38,985.52-16,920.83

Finding the Fourth Proportional to 28,249.49, 38,985.52 and 16,920.83

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Solution

The fourth proportional to 28,249.49, 38,985.52 and 16,920.83 is: 23,351.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,249.49 : 38,985.52 = 16,920.83 : x
  2. Step 2: Convert to fraction form
    28,249.49/38,985.52 = 16,920.83/x
  3. Step 3: Cross multiply
    28,249.49x = 38,985.52 × 16,920.83
  4. Step 4: Simplify right side
    28,249.49x = 659,667,356.38
  5. Step 5: Solve for x
    x = 659,667,356.38/28,249.49
  6. Step 6: Final answer
    x = 23,351.48

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Double scale
Find fourth proportional to 28,250.49, 38,986.90 and 16,921.83
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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.