Home / 28,234.20-38,965.58-15,663

Finding the Fourth Proportional to 28,234.20, 38,965.58 and 15,663

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Solution

The fourth proportional to 28,234.20, 38,965.58 and 15,663 is: 21,616.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,234.20 : 38,965.58 = 15,663 : x
  2. Step 2: Convert to fraction form
    28,234.20/38,965.58 = 15,663/x
  3. Step 3: Cross multiply
    28,234.20x = 38,965.58 × 15,663
  4. Step 4: Simplify right side
    28,234.20x = 610,317,879.54
  5. Step 5: Solve for x
    x = 610,317,879.54/28,234.20
  6. Step 6: Final answer
    x = 21,616.26

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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.