Home / 31,749.33-43,788.81-20,420.13

Finding the Fourth Proportional to 31,749.33, 43,788.81 and 20,420.13

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Solution

The fourth proportional to 31,749.33, 43,788.81 and 20,420.13 is: 28,163.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,749.33 : 43,788.81 = 20,420.13 : x
  2. Step 2: Convert to fraction form
    31,749.33/43,788.81 = 20,420.13/x
  3. Step 3: Cross multiply
    31,749.33x = 43,788.81 × 20,420.13
  4. Step 4: Simplify right side
    31,749.33x = 894,173,192.75
  5. Step 5: Solve for x
    x = 894,173,192.75/31,749.33
  6. Step 6: Final answer
    x = 28,163.53

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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.