Home / 13,579.70-20,369.98-4,219.77

Finding the Fourth Proportional to 13,579.70, 20,369.98 and 4,219.77

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Solution

The fourth proportional to 13,579.70, 20,369.98 and 4,219.77 is: 6,329.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,579.70 : 20,369.98 = 4,219.77 : x
  2. Step 2: Convert to fraction form
    13,579.70/20,369.98 = 4,219.77/x
  3. Step 3: Cross multiply
    13,579.70x = 20,369.98 × 4,219.77
  4. Step 4: Simplify right side
    13,579.70x = 85,956,535.66
  5. Step 5: Solve for x
    x = 85,956,535.66/13,579.70
  6. Step 6: Final answer
    x = 6,329.78

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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.