Home / 20,856.66-31,287.60-6,818.10

Finding the Fourth Proportional to 20,856.66, 31,287.60 and 6,818.10

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Solution

The fourth proportional to 20,856.66, 31,287.60 and 6,818.10 is: 10,228.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,856.66 : 31,287.60 = 6,818.10 : x
  2. Step 2: Convert to fraction form
    20,856.66/31,287.60 = 6,818.10/x
  3. Step 3: Cross multiply
    20,856.66x = 31,287.60 × 6,818.10
  4. Step 4: Simplify right side
    20,856.66x = 213,321,985.56
  5. Step 5: Solve for x
    x = 213,321,985.56/20,856.66
  6. Step 6: Final answer
    x = 10,228.00

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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.