Home / 7,113.28-10,669.20-1,919.68

Finding the Fourth Proportional to 7,113.28, 10,669.20 and 1,919.68

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Solution

The fourth proportional to 7,113.28, 10,669.20 and 1,919.68 is: 2,879.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,113.28 : 10,669.20 = 1,919.68 : x
  2. Step 2: Convert to fraction form
    7,113.28/10,669.20 = 1,919.68/x
  3. Step 3: Cross multiply
    7,113.28x = 10,669.20 × 1,919.68
  4. Step 4: Simplify right side
    7,113.28x = 20,481,449.86
  5. Step 5: Solve for x
    x = 20,481,449.86/7,113.28
  6. Step 6: Final answer
    x = 2,879.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.