Home / 10,421.72-15,629.54-4,179.72

Finding the Fourth Proportional to 10,421.72, 15,629.54 and 4,179.72

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Solution

The fourth proportional to 10,421.72, 15,629.54 and 4,179.72 is: 6,268.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,421.72 : 15,629.54 = 4,179.72 : x
  2. Step 2: Convert to fraction form
    10,421.72/15,629.54 = 4,179.72/x
  3. Step 3: Cross multiply
    10,421.72x = 15,629.54 × 4,179.72
  4. Step 4: Simplify right side
    10,421.72x = 65,327,100.93
  5. Step 5: Solve for x
    x = 65,327,100.93/10,421.72
  6. Step 6: Final answer
    x = 6,268.36

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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.