Home / 21,587.82-29,795.38-12,156.44

Finding the Fourth Proportional to 21,587.82, 29,795.38 and 12,156.44

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Solution

The fourth proportional to 21,587.82, 29,795.38 and 12,156.44 is: 16,778.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,587.82 : 29,795.38 = 12,156.44 : x
  2. Step 2: Convert to fraction form
    21,587.82/29,795.38 = 12,156.44/x
  3. Step 3: Cross multiply
    21,587.82x = 29,795.38 × 12,156.44
  4. Step 4: Simplify right side
    21,587.82x = 362,205,749.25
  5. Step 5: Solve for x
    x = 362,205,749.25/21,587.82
  6. Step 6: Final answer
    x = 16,778.25

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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.