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Finding the Fourth Proportional to 4,991.87, 6,888.55 and 2,865.91

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Solution

The fourth proportional to 4,991.87, 6,888.55 and 2,865.91 is: 3,954.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,991.87 : 6,888.55 = 2,865.91 : x
  2. Step 2: Convert to fraction form
    4,991.87/6,888.55 = 2,865.91/x
  3. Step 3: Cross multiply
    4,991.87x = 6,888.55 × 2,865.91
  4. Step 4: Simplify right side
    4,991.87x = 19,741,967.50
  5. Step 5: Solve for x
    x = 19,741,967.50/4,991.87
  6. Step 6: Final answer
    x = 3,954.82

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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.