Home / 9,919.84-13,690.56-5,728

Finding the Fourth Proportional to 9,919.84, 13,690.56 and 5,728

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Solution

The fourth proportional to 9,919.84, 13,690.56 and 5,728 is: 7,905.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,919.84 : 13,690.56 = 5,728 : x
  2. Step 2: Convert to fraction form
    9,919.84/13,690.56 = 5,728/x
  3. Step 3: Cross multiply
    9,919.84x = 13,690.56 × 5,728
  4. Step 4: Simplify right side
    9,919.84x = 78,419,527.68
  5. Step 5: Solve for x
    x = 78,419,527.68/9,919.84
  6. Step 6: Final answer
    x = 7,905.32

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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.