Home / 38,919.60-53,705.85-21,918.41

Finding the Fourth Proportional to 38,919.60, 53,705.85 and 21,918.41

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Solution

The fourth proportional to 38,919.60, 53,705.85 and 21,918.41 is: 30,245.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,919.60 : 53,705.85 = 21,918.41 : x
  2. Step 2: Convert to fraction form
    38,919.60/53,705.85 = 21,918.41/x
  3. Step 3: Cross multiply
    38,919.60x = 53,705.85 × 21,918.41
  4. Step 4: Simplify right side
    38,919.60x = 1,177,146,571.17
  5. Step 5: Solve for x
    x = 1,177,146,571.17/38,919.60
  6. Step 6: Final answer
    x = 30,245.60

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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.