Home / 5,137.40-7,089.68-3,120.24

Finding the Fourth Proportional to 5,137.40, 7,089.68 and 3,120.24

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Solution

The fourth proportional to 5,137.40, 7,089.68 and 3,120.24 is: 4,305.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,137.40 : 7,089.68 = 3,120.24 : x
  2. Step 2: Convert to fraction form
    5,137.40/7,089.68 = 3,120.24/x
  3. Step 3: Cross multiply
    5,137.40x = 7,089.68 × 3,120.24
  4. Step 4: Simplify right side
    5,137.40x = 22,121,503.12
  5. Step 5: Solve for x
    x = 22,121,503.12/5,137.40
  6. Step 6: Final answer
    x = 4,305.97

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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.