Home / 13,445.60-20,168.40-12,876.80

Finding the Fourth Proportional to 13,445.60, 20,168.40 and 12,876.80

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Solution

The fourth proportional to 13,445.60, 20,168.40 and 12,876.80 is: 19,315.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,445.60 : 20,168.40 = 12,876.80 : x
  2. Step 2: Convert to fraction form
    13,445.60/20,168.40 = 12,876.80/x
  3. Step 3: Cross multiply
    13,445.60x = 20,168.40 × 12,876.80
  4. Step 4: Simplify right side
    13,445.60x = 259,704,453.12
  5. Step 5: Solve for x
    x = 259,704,453.12/13,445.60
  6. Step 6: Final answer
    x = 19,315.20

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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.