Home / 5,145.36-7,100.35-3,155.59

Finding the Fourth Proportional to 5,145.36, 7,100.35 and 3,155.59

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Solution

The fourth proportional to 5,145.36, 7,100.35 and 3,155.59 is: 4,354.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,145.36 : 7,100.35 = 3,155.59 : x
  2. Step 2: Convert to fraction form
    5,145.36/7,100.35 = 3,155.59/x
  3. Step 3: Cross multiply
    5,145.36x = 7,100.35 × 3,155.59
  4. Step 4: Simplify right side
    5,145.36x = 22,405,793.46
  5. Step 5: Solve for x
    x = 22,405,793.46/5,145.36
  6. Step 6: Final answer
    x = 4,354.56

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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.