Home / 7,347.67-10,139.78-3,990.49

Finding the Fourth Proportional to 7,347.67, 10,139.78 and 3,990.49

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Solution

The fourth proportional to 7,347.67, 10,139.78 and 3,990.49 is: 5,506.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,347.67 : 10,139.78 = 3,990.49 : x
  2. Step 2: Convert to fraction form
    7,347.67/10,139.78 = 3,990.49/x
  3. Step 3: Cross multiply
    7,347.67x = 10,139.78 × 3,990.49
  4. Step 4: Simplify right side
    7,347.67x = 40,462,620.04
  5. Step 5: Solve for x
    x = 40,462,620.04/7,347.67
  6. Step 6: Final answer
    x = 5,506.87

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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.