Home / 20,850.78-31,272.84-6,810.69

Finding the Fourth Proportional to 20,850.78, 31,272.84 and 6,810.69

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Solution

The fourth proportional to 20,850.78, 31,272.84 and 6,810.69 is: 10,214.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,850.78 : 31,272.84 = 6,810.69 : x
  2. Step 2: Convert to fraction form
    20,850.78/31,272.84 = 6,810.69/x
  3. Step 3: Cross multiply
    20,850.78x = 31,272.84 × 6,810.69
  4. Step 4: Simplify right side
    20,850.78x = 212,989,618.66
  5. Step 5: Solve for x
    x = 212,989,618.66/20,850.78
  6. Step 6: Final answer
    x = 10,214.95

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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.