Home / 7,348.25-10,140.31-3,990.99

Finding the Fourth Proportional to 7,348.25, 10,140.31 and 3,990.99

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Solution

The fourth proportional to 7,348.25, 10,140.31 and 3,990.99 is: 5,507.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,348.25 : 10,140.31 = 3,990.99 : x
  2. Step 2: Convert to fraction form
    7,348.25/10,140.31 = 3,990.99/x
  3. Step 3: Cross multiply
    7,348.25x = 10,140.31 × 3,990.99
  4. Step 4: Simplify right side
    7,348.25x = 40,469,875.81
  5. Step 5: Solve for x
    x = 40,469,875.81/7,348.25
  6. Step 6: Final answer
    x = 5,507.42

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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.