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Finding the Fourth Proportional to 13,605.90, 20,408.91 and 4,841.49

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Solution

The fourth proportional to 13,605.90, 20,408.91 and 4,841.49 is: 7,262.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,605.90 : 20,408.91 = 4,841.49 : x
  2. Step 2: Convert to fraction form
    13,605.90/20,408.91 = 4,841.49/x
  3. Step 3: Cross multiply
    13,605.90x = 20,408.91 × 4,841.49
  4. Step 4: Simplify right side
    13,605.90x = 98,809,533.68
  5. Step 5: Solve for x
    x = 98,809,533.68/13,605.90
  6. Step 6: Final answer
    x = 7,262.26

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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.