Home / 13,608.10-18,781.23-8,305.99

Finding the Fourth Proportional to 13,608.10, 18,781.23 and 8,305.99

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Solution

The fourth proportional to 13,608.10, 18,781.23 and 8,305.99 is: 11,463.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,608.10 : 18,781.23 = 8,305.99 : x
  2. Step 2: Convert to fraction form
    13,608.10/18,781.23 = 8,305.99/x
  3. Step 3: Cross multiply
    13,608.10x = 18,781.23 × 8,305.99
  4. Step 4: Simplify right side
    13,608.10x = 155,996,708.57
  5. Step 5: Solve for x
    x = 155,996,708.57/13,608.10
  6. Step 6: Final answer
    x = 11,463.52

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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.