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Finding the Fourth Proportional to 5,145.07, 7,100.23 and 2,787.23

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Solution

The fourth proportional to 5,145.07, 7,100.23 and 2,787.23 is: 3,846.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,145.07 : 7,100.23 = 2,787.23 : x
  2. Step 2: Convert to fraction form
    5,145.07/7,100.23 = 2,787.23/x
  3. Step 3: Cross multiply
    5,145.07x = 7,100.23 × 2,787.23
  4. Step 4: Simplify right side
    5,145.07x = 19,789,938.56
  5. Step 5: Solve for x
    x = 19,789,938.56/5,145.07
  6. Step 6: Final answer
    x = 3,846.39

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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.