Home / 7,139.28-10,708.11-1,945.56

Finding the Fourth Proportional to 7,139.28, 10,708.11 and 1,945.56

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Solution

The fourth proportional to 7,139.28, 10,708.11 and 1,945.56 is: 2,918.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,139.28 : 10,708.11 = 1,945.56 : x
  2. Step 2: Convert to fraction form
    7,139.28/10,708.11 = 1,945.56/x
  3. Step 3: Cross multiply
    7,139.28x = 10,708.11 × 1,945.56
  4. Step 4: Simplify right side
    7,139.28x = 20,833,270.49
  5. Step 5: Solve for x
    x = 20,833,270.49/7,139.28
  6. Step 6: Final answer
    x = 2,918.12

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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.