Home / 39,861.55-55,009.29-21,957.18

Finding the Fourth Proportional to 39,861.55, 55,009.29 and 21,957.18

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Solution

The fourth proportional to 39,861.55, 55,009.29 and 21,957.18 is: 30,301.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,861.55 : 55,009.29 = 21,957.18 : x
  2. Step 2: Convert to fraction form
    39,861.55/55,009.29 = 21,957.18/x
  3. Step 3: Cross multiply
    39,861.55x = 55,009.29 × 21,957.18
  4. Step 4: Simplify right side
    39,861.55x = 1,207,848,882.20
  5. Step 5: Solve for x
    x = 1,207,848,882.20/39,861.55
  6. Step 6: Final answer
    x = 30,301.10

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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.