Home / 7,105.28-10,657.11-1,911.56

Finding the Fourth Proportional to 7,105.28, 10,657.11 and 1,911.56

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Solution

The fourth proportional to 7,105.28, 10,657.11 and 1,911.56 is: 2,867.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,105.28 : 10,657.11 = 1,911.56 : x
  2. Step 2: Convert to fraction form
    7,105.28/10,657.11 = 1,911.56/x
  3. Step 3: Cross multiply
    7,105.28x = 10,657.11 × 1,911.56
  4. Step 4: Simplify right side
    7,105.28x = 20,371,705.19
  5. Step 5: Solve for x
    x = 20,371,705.19/7,105.28
  6. Step 6: Final answer
    x = 2,867.12

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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.