Home / 13,421.25-20,137.56-7,179.63

Finding the Fourth Proportional to 13,421.25, 20,137.56 and 7,179.63

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Solution

The fourth proportional to 13,421.25, 20,137.56 and 7,179.63 is: 10,772.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,421.25 : 20,137.56 = 7,179.63 : x
  2. Step 2: Convert to fraction form
    13,421.25/20,137.56 = 7,179.63/x
  3. Step 3: Cross multiply
    13,421.25x = 20,137.56 × 7,179.63
  4. Step 4: Simplify right side
    13,421.25x = 144,580,229.90
  5. Step 5: Solve for x
    x = 144,580,229.90/13,421.25
  6. Step 6: Final answer
    x = 10,772.49

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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.