Home / 39,141.35-54,015.20-21,236.40

Finding the Fourth Proportional to 39,141.35, 54,015.20 and 21,236.40

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Solution

The fourth proportional to 39,141.35, 54,015.20 and 21,236.40 is: 29,306.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,141.35 : 54,015.20 = 21,236.40 : x
  2. Step 2: Convert to fraction form
    39,141.35/54,015.20 = 21,236.40/x
  3. Step 3: Cross multiply
    39,141.35x = 54,015.20 × 21,236.40
  4. Step 4: Simplify right side
    39,141.35x = 1,147,088,287.10
  5. Step 5: Solve for x
    x = 1,147,088,287.10/39,141.35
  6. Step 6: Final answer
    x = 29,306.31

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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.