Home / 31,451.52-43,388.64-20,115.36

Finding the Fourth Proportional to 31,451.52, 43,388.64 and 20,115.36

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Solution

The fourth proportional to 31,451.52, 43,388.64 and 20,115.36 is: 27,749.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,451.52 : 43,388.64 = 20,115.36 : x
  2. Step 2: Convert to fraction form
    31,451.52/43,388.64 = 20,115.36/x
  3. Step 3: Cross multiply
    31,451.52x = 43,388.64 × 20,115.36
  4. Step 4: Simplify right side
    31,451.52x = 872,778,113.51
  5. Step 5: Solve for x
    x = 872,778,113.51/31,451.52
  6. Step 6: Final answer
    x = 27,749.95

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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.