Home / 13,728.38-18,945.51-8,426.12

Finding the Fourth Proportional to 13,728.38, 18,945.51 and 8,426.12

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Solution

The fourth proportional to 13,728.38, 18,945.51 and 8,426.12 is: 11,628.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,728.38 : 18,945.51 = 8,426.12 : x
  2. Step 2: Convert to fraction form
    13,728.38/18,945.51 = 8,426.12/x
  3. Step 3: Cross multiply
    13,728.38x = 18,945.51 × 8,426.12
  4. Step 4: Simplify right side
    13,728.38x = 159,637,140.72
  5. Step 5: Solve for x
    x = 159,637,140.72/13,728.38
  6. Step 6: Final answer
    x = 11,628.26

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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.