Home / 20,961.99-31,463.64-15,399.72

Finding the Fourth Proportional to 20,961.99, 31,463.64 and 15,399.72

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Solution

The fourth proportional to 20,961.99, 31,463.64 and 15,399.72 is: 23,114.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,961.99 : 31,463.64 = 15,399.72 : x
  2. Step 2: Convert to fraction form
    20,961.99/31,463.64 = 15,399.72/x
  3. Step 3: Cross multiply
    20,961.99x = 31,463.64 × 15,399.72
  4. Step 4: Simplify right side
    20,961.99x = 484,531,246.18
  5. Step 5: Solve for x
    x = 484,531,246.18/20,961.99
  6. Step 6: Final answer
    x = 23,114.75

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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.