Home / 13,729.38-18,946.89-8,427.12

Finding the Fourth Proportional to 13,729.38, 18,946.89 and 8,427.12

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Solution

The fourth proportional to 13,729.38, 18,946.89 and 8,427.12 is: 11,629.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,729.38 : 18,946.89 = 8,427.12 : x
  2. Step 2: Convert to fraction form
    13,729.38/18,946.89 = 8,427.12/x
  3. Step 3: Cross multiply
    13,729.38x = 18,946.89 × 8,427.12
  4. Step 4: Simplify right side
    13,729.38x = 159,667,715.66
  5. Step 5: Solve for x
    x = 159,667,715.66/13,729.38
  6. Step 6: Final answer
    x = 11,629.64

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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.