Home / 39,745.28-54,849.50-21,840.74

Finding the Fourth Proportional to 39,745.28, 54,849.50 and 21,840.74

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Solution

The fourth proportional to 39,745.28, 54,849.50 and 21,840.74 is: 30,140.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,745.28 : 54,849.50 = 21,840.74 : x
  2. Step 2: Convert to fraction form
    39,745.28/54,849.50 = 21,840.74/x
  3. Step 3: Cross multiply
    39,745.28x = 54,849.50 × 21,840.74
  4. Step 4: Simplify right side
    39,745.28x = 1,197,953,285.18
  5. Step 5: Solve for x
    x = 1,197,953,285.18/39,745.28
  6. Step 6: Final answer
    x = 30,140.77

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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.