Home / 39,911.82-55,021.08-31,399.17

Finding the Fourth Proportional to 39,911.82, 55,021.08 and 31,399.17

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Solution

The fourth proportional to 39,911.82, 55,021.08 and 31,399.17 is: 43,285.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,911.82 : 55,021.08 = 31,399.17 : x
  2. Step 2: Convert to fraction form
    39,911.82/55,021.08 = 31,399.17/x
  3. Step 3: Cross multiply
    39,911.82x = 55,021.08 × 31,399.17
  4. Step 4: Simplify right side
    39,911.82x = 1,727,616,244.50
  5. Step 5: Solve for x
    x = 1,727,616,244.50/39,911.82
  6. Step 6: Final answer
    x = 43,285.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.