Home / 39,025.94-53,855.79-21,120.95

Finding the Fourth Proportional to 39,025.94, 53,855.79 and 21,120.95

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Solution

The fourth proportional to 39,025.94, 53,855.79 and 21,120.95 is: 29,146.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,025.94 : 53,855.79 = 21,120.95 : x
  2. Step 2: Convert to fraction form
    39,025.94/53,855.79 = 21,120.95/x
  3. Step 3: Cross multiply
    39,025.94x = 53,855.79 × 21,120.95
  4. Step 4: Simplify right side
    39,025.94x = 1,137,485,178.52
  5. Step 5: Solve for x
    x = 1,137,485,178.52/39,025.94
  6. Step 6: Final answer
    x = 29,146.90

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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.