Home / 5,157.72-7,117.64-2,799.86

Finding the Fourth Proportional to 5,157.72, 7,117.64 and 2,799.86

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Solution

The fourth proportional to 5,157.72, 7,117.64 and 2,799.86 is: 3,863.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,157.72 : 7,117.64 = 2,799.86 : x
  2. Step 2: Convert to fraction form
    5,157.72/7,117.64 = 2,799.86/x
  3. Step 3: Cross multiply
    5,157.72x = 7,117.64 × 2,799.86
  4. Step 4: Simplify right side
    5,157.72x = 19,928,381.53
  5. Step 5: Solve for x
    x = 19,928,381.53/5,157.72
  6. Step 6: Final answer
    x = 3,863.80

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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.