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Finding the Fourth Proportional to 13,339.42, 20,010.14 and 3,978.70

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Solution

The fourth proportional to 13,339.42, 20,010.14 and 3,978.70 is: 5,968.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,339.42 : 20,010.14 = 3,978.70 : x
  2. Step 2: Convert to fraction form
    13,339.42/20,010.14 = 3,978.70/x
  3. Step 3: Cross multiply
    13,339.42x = 20,010.14 × 3,978.70
  4. Step 4: Simplify right side
    13,339.42x = 79,614,324.12
  5. Step 5: Solve for x
    x = 79,614,324.12/13,339.42
  6. Step 6: Final answer
    x = 5,968.35

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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.