Home / 31,383.36-43,308-18,799.20

Finding the Fourth Proportional to 31,383.36, 43,308 and 18,799.20

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Solution

The fourth proportional to 31,383.36, 43,308 and 18,799.20 is: 25,942.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,383.36 : 43,308 = 18,799.20 : x
  2. Step 2: Convert to fraction form
    31,383.36/43,308 = 18,799.20/x
  3. Step 3: Cross multiply
    31,383.36x = 43,308 × 18,799.20
  4. Step 4: Simplify right side
    31,383.36x = 814,155,753.60
  5. Step 5: Solve for x
    x = 814,155,753.60/31,383.36
  6. Step 6: Final answer
    x = 25,942.27

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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.