Home / 15,513.82-21,408.44-8,440.25

Finding the Fourth Proportional to 15,513.82, 21,408.44 and 8,440.25

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Solution

The fourth proportional to 15,513.82, 21,408.44 and 8,440.25 is: 11,647.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,513.82 : 21,408.44 = 8,440.25 : x
  2. Step 2: Convert to fraction form
    15,513.82/21,408.44 = 8,440.25/x
  3. Step 3: Cross multiply
    15,513.82x = 21,408.44 × 8,440.25
  4. Step 4: Simplify right side
    15,513.82x = 180,692,436.47
  5. Step 5: Solve for x
    x = 180,692,436.47/15,513.82
  6. Step 6: Final answer
    x = 11,647.19

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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.