Home / 5,087.28-7,019.55-2,991

Finding the Fourth Proportional to 5,087.28, 7,019.55 and 2,991

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Solution

The fourth proportional to 5,087.28, 7,019.55 and 2,991 is: 4,127.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,087.28 : 7,019.55 = 2,991 : x
  2. Step 2: Convert to fraction form
    5,087.28/7,019.55 = 2,991/x
  3. Step 3: Cross multiply
    5,087.28x = 7,019.55 × 2,991
  4. Step 4: Simplify right side
    5,087.28x = 20,995,474.05
  5. Step 5: Solve for x
    x = 20,995,474.05/5,087.28
  6. Step 6: Final answer
    x = 4,127.05

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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.