Home / 13,440.47-20,161.85-3,579.75

Finding the Fourth Proportional to 13,440.47, 20,161.85 and 3,579.75

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Solution

The fourth proportional to 13,440.47, 20,161.85 and 3,579.75 is: 5,369.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,440.47 : 20,161.85 = 3,579.75 : x
  2. Step 2: Convert to fraction form
    13,440.47/20,161.85 = 3,579.75/x
  3. Step 3: Cross multiply
    13,440.47x = 20,161.85 × 3,579.75
  4. Step 4: Simplify right side
    13,440.47x = 72,174,364.64
  5. Step 5: Solve for x
    x = 72,174,364.64/13,440.47
  6. Step 6: Final answer
    x = 5,369.93

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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.