Home / 3,931.20-5,424.86-2,162.76

Finding the Fourth Proportional to 3,931.20, 5,424.86 and 2,162.76

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Solution

The fourth proportional to 3,931.20, 5,424.86 and 2,162.76 is: 2,984.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,931.20 : 5,424.86 = 2,162.76 : x
  2. Step 2: Convert to fraction form
    3,931.20/5,424.86 = 2,162.76/x
  3. Step 3: Cross multiply
    3,931.20x = 5,424.86 × 2,162.76
  4. Step 4: Simplify right side
    3,931.20x = 11,732,670.21
  5. Step 5: Solve for x
    x = 11,732,670.21/3,931.20
  6. Step 6: Final answer
    x = 2,984.50

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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.