Home / 28,211.38-38,919.15-18,137.95

Finding the Fourth Proportional to 28,211.38, 38,919.15 and 18,137.95

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Solution

The fourth proportional to 28,211.38, 38,919.15 and 18,137.95 is: 25,022.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,211.38 : 38,919.15 = 18,137.95 : x
  2. Step 2: Convert to fraction form
    28,211.38/38,919.15 = 18,137.95/x
  3. Step 3: Cross multiply
    28,211.38x = 38,919.15 × 18,137.95
  4. Step 4: Simplify right side
    28,211.38x = 705,913,596.74
  5. Step 5: Solve for x
    x = 705,913,596.74/28,211.38
  6. Step 6: Final answer
    x = 25,022.30

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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.