Home / 20,854.78-31,282.56-6,814.84

Finding the Fourth Proportional to 20,854.78, 31,282.56 and 6,814.84

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Solution

The fourth proportional to 20,854.78, 31,282.56 and 6,814.84 is: 10,222.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,854.78 : 31,282.56 = 6,814.84 : x
  2. Step 2: Convert to fraction form
    20,854.78/31,282.56 = 6,814.84/x
  3. Step 3: Cross multiply
    20,854.78x = 31,282.56 × 6,814.84
  4. Step 4: Simplify right side
    20,854.78x = 213,185,641.19
  5. Step 5: Solve for x
    x = 213,185,641.19/20,854.78
  6. Step 6: Final answer
    x = 10,222.39

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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.