Home / 20,847.87-31,272.71-6,807.78

Finding the Fourth Proportional to 20,847.87, 31,272.71 and 6,807.78

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Solution

The fourth proportional to 20,847.87, 31,272.71 and 6,807.78 is: 10,211.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,847.87 : 31,272.71 = 6,807.78 : x
  2. Step 2: Convert to fraction form
    20,847.87/31,272.71 = 6,807.78/x
  3. Step 3: Cross multiply
    20,847.87x = 31,272.71 × 6,807.78
  4. Step 4: Simplify right side
    20,847.87x = 212,897,695.64
  5. Step 5: Solve for x
    x = 212,897,695.64/20,847.87
  6. Step 6: Final answer
    x = 10,211.96

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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.