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Finding the Fourth Proportional to 5,157.69, 7,117.59 and 2,799.78

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Solution

The fourth proportional to 5,157.69, 7,117.59 and 2,799.78 is: 3,863.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,157.69 : 7,117.59 = 2,799.78 : x
  2. Step 2: Convert to fraction form
    5,157.69/7,117.59 = 2,799.78/x
  3. Step 3: Cross multiply
    5,157.69x = 7,117.59 × 2,799.78
  4. Step 4: Simplify right side
    5,157.69x = 19,927,686.13
  5. Step 5: Solve for x
    x = 19,927,686.13/5,157.69
  6. Step 6: Final answer
    x = 3,863.68

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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.