Home / 20,812.52-31,215.87-6,772.68

Finding the Fourth Proportional to 20,812.52, 31,215.87 and 6,772.68

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Solution

The fourth proportional to 20,812.52, 31,215.87 and 6,772.68 is: 10,158.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,812.52 : 31,215.87 = 6,772.68 : x
  2. Step 2: Convert to fraction form
    20,812.52/31,215.87 = 6,772.68/x
  3. Step 3: Cross multiply
    20,812.52x = 31,215.87 × 6,772.68
  4. Step 4: Simplify right side
    20,812.52x = 211,415,098.43
  5. Step 5: Solve for x
    x = 211,415,098.43/20,812.52
  6. Step 6: Final answer
    x = 10,158.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.