Home / 13,339.55-20,010.47-3,978.97

Finding the Fourth Proportional to 13,339.55, 20,010.47 and 3,978.97

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Solution

The fourth proportional to 13,339.55, 20,010.47 and 3,978.97 is: 5,968.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,339.55 : 20,010.47 = 3,978.97 : x
  2. Step 2: Convert to fraction form
    13,339.55/20,010.47 = 3,978.97/x
  3. Step 3: Cross multiply
    13,339.55x = 20,010.47 × 3,978.97
  4. Step 4: Simplify right side
    13,339.55x = 79,620,989.89
  5. Step 5: Solve for x
    x = 79,620,989.89/13,339.55
  6. Step 6: Final answer
    x = 5,968.79

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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.