Home / 39,867.36-55,015.56-21,961.68

Finding the Fourth Proportional to 39,867.36, 55,015.56 and 21,961.68

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Solution

The fourth proportional to 39,867.36, 55,015.56 and 21,961.68 is: 30,306.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,867.36 : 55,015.56 = 21,961.68 : x
  2. Step 2: Convert to fraction form
    39,867.36/55,015.56 = 21,961.68/x
  3. Step 3: Cross multiply
    39,867.36x = 55,015.56 × 21,961.68
  4. Step 4: Simplify right side
    39,867.36x = 1,208,234,123.74
  5. Step 5: Solve for x
    x = 1,208,234,123.74/39,867.36
  6. Step 6: Final answer
    x = 30,306.35

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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.