Home / 15,121.86-20,863.35-9,151.62

Finding the Fourth Proportional to 15,121.86, 20,863.35 and 9,151.62

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Solution

The fourth proportional to 15,121.86, 20,863.35 and 9,151.62 is: 12,626.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,121.86 : 20,863.35 = 9,151.62 : x
  2. Step 2: Convert to fraction form
    15,121.86/20,863.35 = 9,151.62/x
  3. Step 3: Cross multiply
    15,121.86x = 20,863.35 × 9,151.62
  4. Step 4: Simplify right side
    15,121.86x = 190,933,451.13
  5. Step 5: Solve for x
    x = 190,933,451.13/15,121.86
  6. Step 6: Final answer
    x = 12,626.32

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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.