Home / 5,145.72-7,102.90-3,129.16

Finding the Fourth Proportional to 5,145.72, 7,102.90 and 3,129.16

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Solution

The fourth proportional to 5,145.72, 7,102.90 and 3,129.16 is: 4,319.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,145.72 : 7,102.90 = 3,129.16 : x
  2. Step 2: Convert to fraction form
    5,145.72/7,102.90 = 3,129.16/x
  3. Step 3: Cross multiply
    5,145.72x = 7,102.90 × 3,129.16
  4. Step 4: Simplify right side
    5,145.72x = 22,226,110.56
  5. Step 5: Solve for x
    x = 22,226,110.56/5,145.72
  6. Step 6: Final answer
    x = 4,319.34

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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.