Home / 39,745.78-54,849.14-21,840.75

Finding the Fourth Proportional to 39,745.78, 54,849.14 and 21,840.75

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Solution

The fourth proportional to 39,745.78, 54,849.14 and 21,840.75 is: 30,140.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,745.78 : 54,849.14 = 21,840.75 : x
  2. Step 2: Convert to fraction form
    39,745.78/54,849.14 = 21,840.75/x
  3. Step 3: Cross multiply
    39,745.78x = 54,849.14 × 21,840.75
  4. Step 4: Simplify right side
    39,745.78x = 1,197,946,354.46
  5. Step 5: Solve for x
    x = 1,197,946,354.46/39,745.78
  6. Step 6: Final answer
    x = 30,140.21

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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.