Home / 20,943.16-31,336.96-11,715.64

Finding the Fourth Proportional to 20,943.16, 31,336.96 and 11,715.64

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Solution

The fourth proportional to 20,943.16, 31,336.96 and 11,715.64 is: 17,529.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,943.16 : 31,336.96 = 11,715.64 : x
  2. Step 2: Convert to fraction form
    20,943.16/31,336.96 = 11,715.64/x
  3. Step 3: Cross multiply
    20,943.16x = 31,336.96 × 11,715.64
  4. Step 4: Simplify right side
    20,943.16x = 367,132,542.05
  5. Step 5: Solve for x
    x = 367,132,542.05/20,943.16
  6. Step 6: Final answer
    x = 17,529.95

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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.