Home / 13,781.78-20,672.62-11,013.87

Finding the Fourth Proportional to 13,781.78, 20,672.62 and 11,013.87

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Solution

The fourth proportional to 13,781.78, 20,672.62 and 11,013.87 is: 16,520.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,781.78 : 20,672.62 = 11,013.87 : x
  2. Step 2: Convert to fraction form
    13,781.78/20,672.62 = 11,013.87/x
  3. Step 3: Cross multiply
    13,781.78x = 20,672.62 × 11,013.87
  4. Step 4: Simplify right side
    13,781.78x = 227,685,599.23
  5. Step 5: Solve for x
    x = 227,685,599.23/13,781.78
  6. Step 6: Final answer
    x = 16,520.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.