Home / 13,679.70-20,516.60-4,320.45

Finding the Fourth Proportional to 13,679.70, 20,516.60 and 4,320.45

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Solution

The fourth proportional to 13,679.70, 20,516.60 and 4,320.45 is: 6,479.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,679.70 : 20,516.60 = 4,320.45 : x
  2. Step 2: Convert to fraction form
    13,679.70/20,516.60 = 4,320.45/x
  3. Step 3: Cross multiply
    13,679.70x = 20,516.60 × 4,320.45
  4. Step 4: Simplify right side
    13,679.70x = 88,640,922.87
  5. Step 5: Solve for x
    x = 88,640,922.87/13,679.70
  6. Step 6: Final answer
    x = 6,479.74

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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.