Home / 31,388.30-43,313.91-28,880.54

Finding the Fourth Proportional to 31,388.30, 43,313.91 and 28,880.54

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Solution

The fourth proportional to 31,388.30, 43,313.91 and 28,880.54 is: 39,853.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,388.30 : 43,313.91 = 28,880.54 : x
  2. Step 2: Convert to fraction form
    31,388.30/43,313.91 = 28,880.54/x
  3. Step 3: Cross multiply
    31,388.30x = 43,313.91 × 28,880.54
  4. Step 4: Simplify right side
    31,388.30x = 1,250,929,110.31
  5. Step 5: Solve for x
    x = 1,250,929,110.31/31,388.30
  6. Step 6: Final answer
    x = 39,853.36

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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.