Home / 7,130.40-9,839.58-3,943.56

Finding the Fourth Proportional to 7,130.40, 9,839.58 and 3,943.56

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Solution

The fourth proportional to 7,130.40, 9,839.58 and 3,943.56 is: 5,441.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,130.40 : 9,839.58 = 3,943.56 : x
  2. Step 2: Convert to fraction form
    7,130.40/9,839.58 = 3,943.56/x
  3. Step 3: Cross multiply
    7,130.40x = 9,839.58 × 3,943.56
  4. Step 4: Simplify right side
    7,130.40x = 38,802,974.10
  5. Step 5: Solve for x
    x = 38,802,974.10/7,130.40
  6. Step 6: Final answer
    x = 5,441.91

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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.