Home / 5,157.78-7,117.63-2,799.87

Finding the Fourth Proportional to 5,157.78, 7,117.63 and 2,799.87

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Solution

The fourth proportional to 5,157.78, 7,117.63 and 2,799.87 is: 3,863.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,157.78 : 7,117.63 = 2,799.87 : x
  2. Step 2: Convert to fraction form
    5,157.78/7,117.63 = 2,799.87/x
  3. Step 3: Cross multiply
    5,157.78x = 7,117.63 × 2,799.87
  4. Step 4: Simplify right side
    5,157.78x = 19,928,438.71
  5. Step 5: Solve for x
    x = 19,928,438.71/5,157.78
  6. Step 6: Final answer
    x = 3,863.76

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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.