Home / 13,420.86-20,131.29-3,560.91

Finding the Fourth Proportional to 13,420.86, 20,131.29 and 3,560.91

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Solution

The fourth proportional to 13,420.86, 20,131.29 and 3,560.91 is: 5,341.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,420.86 : 20,131.29 = 3,560.91 : x
  2. Step 2: Convert to fraction form
    13,420.86/20,131.29 = 3,560.91/x
  3. Step 3: Cross multiply
    13,420.86x = 20,131.29 × 3,560.91
  4. Step 4: Simplify right side
    13,420.86x = 71,685,711.87
  5. Step 5: Solve for x
    x = 71,685,711.87/13,420.86
  6. Step 6: Final answer
    x = 5,341.37

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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.