Home / 20,912.27-31,359.87-10,378.46

Finding the Fourth Proportional to 20,912.27, 31,359.87 and 10,378.46

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Solution

The fourth proportional to 20,912.27, 31,359.87 and 10,378.46 is: 15,563.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,912.27 : 31,359.87 = 10,378.46 : x
  2. Step 2: Convert to fraction form
    20,912.27/31,359.87 = 10,378.46/x
  3. Step 3: Cross multiply
    20,912.27x = 31,359.87 × 10,378.46
  4. Step 4: Simplify right side
    20,912.27x = 325,466,947.71
  5. Step 5: Solve for x
    x = 325,466,947.71/20,912.27
  6. Step 6: Final answer
    x = 15,563.44

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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.