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Finding the Fourth Proportional to 3,889.04, 5,367 and 2,120.72

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Solution

The fourth proportional to 3,889.04, 5,367 and 2,120.72 is: 2,926.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,889.04 : 5,367 = 2,120.72 : x
  2. Step 2: Convert to fraction form
    3,889.04/5,367 = 2,120.72/x
  3. Step 3: Cross multiply
    3,889.04x = 5,367 × 2,120.72
  4. Step 4: Simplify right side
    3,889.04x = 11,381,904.24
  5. Step 5: Solve for x
    x = 11,381,904.24/3,889.04
  6. Step 6: Final answer
    x = 2,926.66

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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.