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Finding the Fourth Proportional to 29,319.21, 43,978.19 and 7,132.70

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Solution

The fourth proportional to 29,319.21, 43,978.19 and 7,132.70 is: 10,698.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,319.21 : 43,978.19 = 7,132.70 : x
  2. Step 2: Convert to fraction form
    29,319.21/43,978.19 = 7,132.70/x
  3. Step 3: Cross multiply
    29,319.21x = 43,978.19 × 7,132.70
  4. Step 4: Simplify right side
    29,319.21x = 313,682,980.26
  5. Step 5: Solve for x
    x = 313,682,980.26/29,319.21
  6. Step 6: Final answer
    x = 10,698.89

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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.