Home / 39,415.92-54,395.12-21,512.07

Finding the Fourth Proportional to 39,415.92, 54,395.12 and 21,512.07

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Solution

The fourth proportional to 39,415.92, 54,395.12 and 21,512.07 is: 29,687.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,415.92 : 54,395.12 = 21,512.07 : x
  2. Step 2: Convert to fraction form
    39,415.92/54,395.12 = 21,512.07/x
  3. Step 3: Cross multiply
    39,415.92x = 54,395.12 × 21,512.07
  4. Step 4: Simplify right side
    39,415.92x = 1,170,151,629.10
  5. Step 5: Solve for x
    x = 1,170,151,629.10/39,415.92
  6. Step 6: Final answer
    x = 29,687.28

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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.