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Finding the Fourth Proportional to 5,145.01, 7,100.10 and 2,787.15

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Solution

The fourth proportional to 5,145.01, 7,100.10 and 2,787.15 is: 3,846.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,145.01 : 7,100.10 = 2,787.15 : x
  2. Step 2: Convert to fraction form
    5,145.01/7,100.10 = 2,787.15/x
  3. Step 3: Cross multiply
    5,145.01x = 7,100.10 × 2,787.15
  4. Step 4: Simplify right side
    5,145.01x = 19,789,070.34
  5. Step 5: Solve for x
    x = 19,789,070.34/5,145.01
  6. Step 6: Final answer
    x = 3,846.27

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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.