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Finding the Fourth Proportional to 5,157.76, 7,117.76 and 2,799.92

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Solution

The fourth proportional to 5,157.76, 7,117.76 and 2,799.92 is: 3,863.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,157.76 : 7,117.76 = 2,799.92 : x
  2. Step 2: Convert to fraction form
    5,157.76/7,117.76 = 2,799.92/x
  3. Step 3: Cross multiply
    5,157.76x = 7,117.76 × 2,799.92
  4. Step 4: Simplify right side
    5,157.76x = 19,929,158.58
  5. Step 5: Solve for x
    x = 19,929,158.58/5,157.76
  6. Step 6: Final answer
    x = 3,863.92

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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.