Home / 39,934.40-55,109.21-21,786.12

Finding the Fourth Proportional to 39,934.40, 55,109.21 and 21,786.12

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Solution

The fourth proportional to 39,934.40, 55,109.21 and 21,786.12 is: 30,064.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,934.40 : 55,109.21 = 21,786.12 : x
  2. Step 2: Convert to fraction form
    39,934.40/55,109.21 = 21,786.12/x
  3. Step 3: Cross multiply
    39,934.40x = 55,109.21 × 21,786.12
  4. Step 4: Simplify right side
    39,934.40x = 1,200,615,753.23
  5. Step 5: Solve for x
    x = 1,200,615,753.23/39,934.40
  6. Step 6: Final answer
    x = 30,064.70

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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.