Home / 20,854.95-31,283.35-6,815.83

Finding the Fourth Proportional to 20,854.95, 31,283.35 and 6,815.83

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Solution

The fourth proportional to 20,854.95, 31,283.35 and 6,815.83 is: 10,224.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,854.95 : 31,283.35 = 6,815.83 : x
  2. Step 2: Convert to fraction form
    20,854.95/31,283.35 = 6,815.83/x
  3. Step 3: Cross multiply
    20,854.95x = 31,283.35 × 6,815.83
  4. Step 4: Simplify right side
    20,854.95x = 213,221,995.43
  5. Step 5: Solve for x
    x = 213,221,995.43/20,854.95
  6. Step 6: Final answer
    x = 10,224.05

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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.