Home / 13,490.43-20,227.81-4,127.78

Finding the Fourth Proportional to 13,490.43, 20,227.81 and 4,127.78

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Solution

The fourth proportional to 13,490.43, 20,227.81 and 4,127.78 is: 6,189.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,490.43 : 20,227.81 = 4,127.78 : x
  2. Step 2: Convert to fraction form
    13,490.43/20,227.81 = 4,127.78/x
  3. Step 3: Cross multiply
    13,490.43x = 20,227.81 × 4,127.78
  4. Step 4: Simplify right side
    13,490.43x = 83,495,949.56
  5. Step 5: Solve for x
    x = 83,495,949.56/13,490.43
  6. Step 6: Final answer
    x = 6,189.27

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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.