Home / 39,861.28-55,008.63-21,956.34

Finding the Fourth Proportional to 39,861.28, 55,008.63 and 21,956.34

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Solution

The fourth proportional to 39,861.28, 55,008.63 and 21,956.34 is: 30,299.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,861.28 : 55,008.63 = 21,956.34 : x
  2. Step 2: Convert to fraction form
    39,861.28/55,008.63 = 21,956.34/x
  3. Step 3: Cross multiply
    39,861.28x = 55,008.63 × 21,956.34
  4. Step 4: Simplify right side
    39,861.28x = 1,207,787,908.17
  5. Step 5: Solve for x
    x = 1,207,787,908.17/39,861.28
  6. Step 6: Final answer
    x = 30,299.78

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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.