Home / 39,963.60-55,149.96-21,814.32

Finding the Fourth Proportional to 39,963.60, 55,149.96 and 21,814.32

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Solution

The fourth proportional to 39,963.60, 55,149.96 and 21,814.32 is: 30,103.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,963.60 : 55,149.96 = 21,814.32 : x
  2. Step 2: Convert to fraction form
    39,963.60/55,149.96 = 21,814.32/x
  3. Step 3: Cross multiply
    39,963.60x = 55,149.96 × 21,814.32
  4. Step 4: Simplify right side
    39,963.60x = 1,203,058,875.43
  5. Step 5: Solve for x
    x = 1,203,058,875.43/39,963.60
  6. Step 6: Final answer
    x = 30,103.87

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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.