Home / 13,420.63-20,128.21-5,097.73

Finding the Fourth Proportional to 13,420.63, 20,128.21 and 5,097.73

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Solution

The fourth proportional to 13,420.63, 20,128.21 and 5,097.73 is: 7,645.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,420.63 : 20,128.21 = 5,097.73 : x
  2. Step 2: Convert to fraction form
    13,420.63/20,128.21 = 5,097.73/x
  3. Step 3: Cross multiply
    13,420.63x = 20,128.21 × 5,097.73
  4. Step 4: Simplify right side
    13,420.63x = 102,608,053.83
  5. Step 5: Solve for x
    x = 102,608,053.83/13,420.63
  6. Step 6: Final answer
    x = 7,645.55

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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.