Home / 13,479.89-20,292.62-12,123.60

Finding the Fourth Proportional to 13,479.89, 20,292.62 and 12,123.60

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Solution

The fourth proportional to 13,479.89, 20,292.62 and 12,123.60 is: 18,250.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,479.89 : 20,292.62 = 12,123.60 : x
  2. Step 2: Convert to fraction form
    13,479.89/20,292.62 = 12,123.60/x
  3. Step 3: Cross multiply
    13,479.89x = 20,292.62 × 12,123.60
  4. Step 4: Simplify right side
    13,479.89x = 246,019,471.12
  5. Step 5: Solve for x
    x = 246,019,471.12/13,479.89
  6. Step 6: Final answer
    x = 18,250.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.