Home / 20,363.20-28,063.16-15,879.85

Finding the Fourth Proportional to 20,363.20, 28,063.16 and 15,879.85

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Solution

The fourth proportional to 20,363.20, 28,063.16 and 15,879.85 is: 21,884.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,363.20 : 28,063.16 = 15,879.85 : x
  2. Step 2: Convert to fraction form
    20,363.20/28,063.16 = 15,879.85/x
  3. Step 3: Cross multiply
    20,363.20x = 28,063.16 × 15,879.85
  4. Step 4: Simplify right side
    20,363.20x = 445,638,681.32
  5. Step 5: Solve for x
    x = 445,638,681.32/20,363.20
  6. Step 6: Final answer
    x = 21,884.51

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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.