Home / 11,120.86-15,346.41-6,643.57

Finding the Fourth Proportional to 11,120.86, 15,346.41 and 6,643.57

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Solution

The fourth proportional to 11,120.86, 15,346.41 and 6,643.57 is: 9,167.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,120.86 : 15,346.41 = 6,643.57 : x
  2. Step 2: Convert to fraction form
    11,120.86/15,346.41 = 6,643.57/x
  3. Step 3: Cross multiply
    11,120.86x = 15,346.41 × 6,643.57
  4. Step 4: Simplify right side
    11,120.86x = 101,954,949.08
  5. Step 5: Solve for x
    x = 101,954,949.08/11,120.86
  6. Step 6: Final answer
    x = 9,167.90

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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.