Home / 13,622.15-20,487.90-12,200.60

Finding the Fourth Proportional to 13,622.15, 20,487.90 and 12,200.60

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Solution

The fourth proportional to 13,622.15, 20,487.90 and 12,200.60 is: 18,349.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,622.15 : 20,487.90 = 12,200.60 : x
  2. Step 2: Convert to fraction form
    13,622.15/20,487.90 = 12,200.60/x
  3. Step 3: Cross multiply
    13,622.15x = 20,487.90 × 12,200.60
  4. Step 4: Simplify right side
    13,622.15x = 249,964,672.74
  5. Step 5: Solve for x
    x = 249,964,672.74/13,622.15
  6. Step 6: Final answer
    x = 18,349.87

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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.