Home / 57,438.40-86,131.68-20,503.36

Finding the Fourth Proportional to 57,438.40, 86,131.68 and 20,503.36

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Solution

The fourth proportional to 57,438.40, 86,131.68 and 20,503.36 is: 30,745.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,438.40 : 86,131.68 = 20,503.36 : x
  2. Step 2: Convert to fraction form
    57,438.40/86,131.68 = 20,503.36/x
  3. Step 3: Cross multiply
    57,438.40x = 86,131.68 × 20,503.36
  4. Step 4: Simplify right side
    57,438.40x = 1,765,988,842.44
  5. Step 5: Solve for x
    x = 1,765,988,842.44/57,438.40
  6. Step 6: Final answer
    x = 30,745.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.