Home / 5,145.32-7,100.53-2,787.47

Finding the Fourth Proportional to 5,145.32, 7,100.53 and 2,787.47

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Solution

The fourth proportional to 5,145.32, 7,100.53 and 2,787.47 is: 3,846.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,145.32 : 7,100.53 = 2,787.47 : x
  2. Step 2: Convert to fraction form
    5,145.32/7,100.53 = 2,787.47/x
  3. Step 3: Cross multiply
    5,145.32x = 7,100.53 × 2,787.47
  4. Step 4: Simplify right side
    5,145.32x = 19,792,514.36
  5. Step 5: Solve for x
    x = 19,792,514.36/5,145.32
  6. Step 6: Final answer
    x = 3,846.70

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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.