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Finding the Fourth Proportional to 39,809.96, 54,937.34 and 21,904.98

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Solution

The fourth proportional to 39,809.96, 54,937.34 and 21,904.98 is: 30,228.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,809.96 : 54,937.34 = 21,904.98 : x
  2. Step 2: Convert to fraction form
    39,809.96/54,937.34 = 21,904.98/x
  3. Step 3: Cross multiply
    39,809.96x = 54,937.34 × 21,904.98
  4. Step 4: Simplify right side
    39,809.96x = 1,203,401,224.43
  5. Step 5: Solve for x
    x = 1,203,401,224.43/39,809.96
  6. Step 6: Final answer
    x = 30,228.65

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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.