Home / 5,145.19-7,100.39-2,787.35

Finding the Fourth Proportional to 5,145.19, 7,100.39 and 2,787.35

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Solution

The fourth proportional to 5,145.19, 7,100.39 and 2,787.35 is: 3,846.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,145.19 : 7,100.39 = 2,787.35 : x
  2. Step 2: Convert to fraction form
    5,145.19/7,100.39 = 2,787.35/x
  3. Step 3: Cross multiply
    5,145.19x = 7,100.39 × 2,787.35
  4. Step 4: Simplify right side
    5,145.19x = 19,791,243.53
  5. Step 5: Solve for x
    x = 19,791,243.53/5,145.19
  6. Step 6: Final answer
    x = 3,846.55

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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.