Home / 15,615.80-21,550.32-8,902.96

Finding the Fourth Proportional to 15,615.80, 21,550.32 and 8,902.96

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Solution

The fourth proportional to 15,615.80, 21,550.32 and 8,902.96 is: 12,286.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,615.80 : 21,550.32 = 8,902.96 : x
  2. Step 2: Convert to fraction form
    15,615.80/21,550.32 = 8,902.96/x
  3. Step 3: Cross multiply
    15,615.80x = 21,550.32 × 8,902.96
  4. Step 4: Simplify right side
    15,615.80x = 191,861,636.95
  5. Step 5: Solve for x
    x = 191,861,636.95/15,615.80
  6. Step 6: Final answer
    x = 12,286.38

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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.