Home / 4,991.72-6,891.21-3,870.14

Finding the Fourth Proportional to 4,991.72, 6,891.21 and 3,870.14

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Solution

The fourth proportional to 4,991.72, 6,891.21 and 3,870.14 is: 5,342.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,991.72 : 6,891.21 = 3,870.14 : x
  2. Step 2: Convert to fraction form
    4,991.72/6,891.21 = 3,870.14/x
  3. Step 3: Cross multiply
    4,991.72x = 6,891.21 × 3,870.14
  4. Step 4: Simplify right side
    4,991.72x = 26,669,913.01
  5. Step 5: Solve for x
    x = 26,669,913.01/4,991.72
  6. Step 6: Final answer
    x = 5,342.84

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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.