Home / 5,145.29-7,100.35-3,020.78

Finding the Fourth Proportional to 5,145.29, 7,100.35 and 3,020.78

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Solution

The fourth proportional to 5,145.29, 7,100.35 and 3,020.78 is: 4,168.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,145.29 : 7,100.35 = 3,020.78 : x
  2. Step 2: Convert to fraction form
    5,145.29/7,100.35 = 3,020.78/x
  3. Step 3: Cross multiply
    5,145.29x = 7,100.35 × 3,020.78
  4. Step 4: Simplify right side
    5,145.29x = 21,448,580.17
  5. Step 5: Solve for x
    x = 21,448,580.17/5,145.29
  6. Step 6: Final answer
    x = 4,168.59

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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.