Home / 28,436.38-39,242.20-15,861.12

Finding the Fourth Proportional to 28,436.38, 39,242.20 and 15,861.12

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Solution

The fourth proportional to 28,436.38, 39,242.20 and 15,861.12 is: 21,888.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,436.38 : 39,242.20 = 15,861.12 : x
  2. Step 2: Convert to fraction form
    28,436.38/39,242.20 = 15,861.12/x
  3. Step 3: Cross multiply
    28,436.38x = 39,242.20 × 15,861.12
  4. Step 4: Simplify right side
    28,436.38x = 622,425,243.26
  5. Step 5: Solve for x
    x = 622,425,243.26/28,436.38
  6. Step 6: Final answer
    x = 21,888.34

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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.