Home / 3,931.62-5,425.48-2,163.20

Finding the Fourth Proportional to 3,931.62, 5,425.48 and 2,163.20

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Solution

The fourth proportional to 3,931.62, 5,425.48 and 2,163.20 is: 2,985.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,931.62 : 5,425.48 = 2,163.20 : x
  2. Step 2: Convert to fraction form
    3,931.62/5,425.48 = 2,163.20/x
  3. Step 3: Cross multiply
    3,931.62x = 5,425.48 × 2,163.20
  4. Step 4: Simplify right side
    3,931.62x = 11,736,398.34
  5. Step 5: Solve for x
    x = 11,736,398.34/3,931.62
  6. Step 6: Final answer
    x = 2,985.13

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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.