Home / 5,638.17-7,780.17-3,120.24

Finding the Fourth Proportional to 5,638.17, 7,780.17 and 3,120.24

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Solution

The fourth proportional to 5,638.17, 7,780.17 and 3,120.24 is: 4,305.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,638.17 : 7,780.17 = 3,120.24 : x
  2. Step 2: Convert to fraction form
    5,638.17/7,780.17 = 3,120.24/x
  3. Step 3: Cross multiply
    5,638.17x = 7,780.17 × 3,120.24
  4. Step 4: Simplify right side
    5,638.17x = 24,275,997.64
  5. Step 5: Solve for x
    x = 24,275,997.64/5,638.17
  6. Step 6: Final answer
    x = 4,305.65

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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.