Home / 15,481.41-21,364.80-8,408.28

Finding the Fourth Proportional to 15,481.41, 21,364.80 and 8,408.28

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Solution

The fourth proportional to 15,481.41, 21,364.80 and 8,408.28 is: 11,603.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,481.41 : 21,364.80 = 8,408.28 : x
  2. Step 2: Convert to fraction form
    15,481.41/21,364.80 = 8,408.28/x
  3. Step 3: Cross multiply
    15,481.41x = 21,364.80 × 8,408.28
  4. Step 4: Simplify right side
    15,481.41x = 179,641,269.13
  5. Step 5: Solve for x
    x = 179,641,269.13/15,481.41
  6. Step 6: Final answer
    x = 11,603.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.