Home / 3,931.15-5,424.86-2,162.75

Finding the Fourth Proportional to 3,931.15, 5,424.86 and 2,162.75

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Solution

The fourth proportional to 3,931.15, 5,424.86 and 2,162.75 is: 2,984.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,931.15 : 5,424.86 = 2,162.75 : x
  2. Step 2: Convert to fraction form
    3,931.15/5,424.86 = 2,162.75/x
  3. Step 3: Cross multiply
    3,931.15x = 5,424.86 × 2,162.75
  4. Step 4: Simplify right side
    3,931.15x = 11,732,615.97
  5. Step 5: Solve for x
    x = 11,732,615.97/3,931.15
  6. Step 6: Final answer
    x = 2,984.53

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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.