Home / 7,139.40-10,705.77-3,806.82

Finding the Fourth Proportional to 7,139.40, 10,705.77 and 3,806.82

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Solution

The fourth proportional to 7,139.40, 10,705.77 and 3,806.82 is: 5,708.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,139.40 : 10,705.77 = 3,806.82 : x
  2. Step 2: Convert to fraction form
    7,139.40/10,705.77 = 3,806.82/x
  3. Step 3: Cross multiply
    7,139.40x = 10,705.77 × 3,806.82
  4. Step 4: Simplify right side
    7,139.40x = 40,754,939.35
  5. Step 5: Solve for x
    x = 40,754,939.35/7,139.40
  6. Step 6: Final answer
    x = 5,708.45

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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.