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Finding the Fourth Proportional to 39,861.63, 55,007.03 and 21,956.24

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Solution

The fourth proportional to 39,861.63, 55,007.03 and 21,956.24 is: 30,298.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,861.63 : 55,007.03 = 21,956.24 : x
  2. Step 2: Convert to fraction form
    39,861.63/55,007.03 = 21,956.24/x
  3. Step 3: Cross multiply
    39,861.63x = 55,007.03 × 21,956.24
  4. Step 4: Simplify right side
    39,861.63x = 1,207,747,744.78
  5. Step 5: Solve for x
    x = 1,207,747,744.78/39,861.63
  6. Step 6: Final answer
    x = 30,298.50

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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.