Home / 20,912.70-31,362.39-6,869.47

Finding the Fourth Proportional to 20,912.70, 31,362.39 and 6,869.47

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Solution

The fourth proportional to 20,912.70, 31,362.39 and 6,869.47 is: 10,302.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,912.70 : 31,362.39 = 6,869.47 : x
  2. Step 2: Convert to fraction form
    20,912.70/31,362.39 = 6,869.47/x
  3. Step 3: Cross multiply
    20,912.70x = 31,362.39 × 6,869.47
  4. Step 4: Simplify right side
    20,912.70x = 215,442,858.95
  5. Step 5: Solve for x
    x = 215,442,858.95/20,912.70
  6. Step 6: Final answer
    x = 10,302.01

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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.