Home / 13,781.34-18,997.74-8,472.06

Finding the Fourth Proportional to 13,781.34, 18,997.74 and 8,472.06

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Solution

The fourth proportional to 13,781.34, 18,997.74 and 8,472.06 is: 11,678.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,781.34 : 18,997.74 = 8,472.06 : x
  2. Step 2: Convert to fraction form
    13,781.34/18,997.74 = 8,472.06/x
  3. Step 3: Cross multiply
    13,781.34x = 18,997.74 × 8,472.06
  4. Step 4: Simplify right side
    13,781.34x = 160,949,993.14
  5. Step 5: Solve for x
    x = 160,949,993.14/13,781.34
  6. Step 6: Final answer
    x = 11,678.83

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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.