Home / 39,813.50-54,939.40-21,905.66

Finding the Fourth Proportional to 39,813.50, 54,939.40 and 21,905.66

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Solution

The fourth proportional to 39,813.50, 54,939.40 and 21,905.66 is: 30,228.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,813.50 : 54,939.40 = 21,905.66 : x
  2. Step 2: Convert to fraction form
    39,813.50/54,939.40 = 21,905.66/x
  3. Step 3: Cross multiply
    39,813.50x = 54,939.40 × 21,905.66
  4. Step 4: Simplify right side
    39,813.50x = 1,203,483,487.54
  5. Step 5: Solve for x
    x = 1,203,483,487.54/39,813.50
  6. Step 6: Final answer
    x = 30,228.03

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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.