Home / 39,808.80-54,937.44-21,905.64

Finding the Fourth Proportional to 39,808.80, 54,937.44 and 21,905.64

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Solution

The fourth proportional to 39,808.80, 54,937.44 and 21,905.64 is: 30,230.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,808.80 : 54,937.44 = 21,905.64 : x
  2. Step 2: Convert to fraction form
    39,808.80/54,937.44 = 21,905.64/x
  3. Step 3: Cross multiply
    39,808.80x = 54,937.44 × 21,905.64
  4. Step 4: Simplify right side
    39,808.80x = 1,203,439,783.16
  5. Step 5: Solve for x
    x = 1,203,439,783.16/39,808.80
  6. Step 6: Final answer
    x = 30,230.50

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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.