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Finding the Fourth Proportional to 3,720.79, 5,134.79 and 2,127.70

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Solution

The fourth proportional to 3,720.79, 5,134.79 and 2,127.70 is: 2,936.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,720.79 : 5,134.79 = 2,127.70 : x
  2. Step 2: Convert to fraction form
    3,720.79/5,134.79 = 2,127.70/x
  3. Step 3: Cross multiply
    3,720.79x = 5,134.79 × 2,127.70
  4. Step 4: Simplify right side
    3,720.79x = 10,925,304.42
  5. Step 5: Solve for x
    x = 10,925,304.42/3,720.79
  6. Step 6: Final answer
    x = 2,936.29

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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.