Home / 39,861.78-55,009.32-21,956.84

Finding the Fourth Proportional to 39,861.78, 55,009.32 and 21,956.84

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Solution

The fourth proportional to 39,861.78, 55,009.32 and 21,956.84 is: 30,300.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,861.78 : 55,009.32 = 21,956.84 : x
  2. Step 2: Convert to fraction form
    39,861.78/55,009.32 = 21,956.84/x
  3. Step 3: Cross multiply
    39,861.78x = 55,009.32 × 21,956.84
  4. Step 4: Simplify right side
    39,861.78x = 1,207,830,837.75
  5. Step 5: Solve for x
    x = 1,207,830,837.75/39,861.78
  6. Step 6: Final answer
    x = 30,300.47

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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.