Home / 21,087.29-29,099.60-12,135.11

Finding the Fourth Proportional to 21,087.29, 29,099.60 and 12,135.11

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Solution

The fourth proportional to 21,087.29, 29,099.60 and 12,135.11 is: 16,745.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,087.29 : 29,099.60 = 12,135.11 : x
  2. Step 2: Convert to fraction form
    21,087.29/29,099.60 = 12,135.11/x
  3. Step 3: Cross multiply
    21,087.29x = 29,099.60 × 12,135.11
  4. Step 4: Simplify right side
    21,087.29x = 353,126,859.03
  5. Step 5: Solve for x
    x = 353,126,859.03/21,087.29
  6. Step 6: Final answer
    x = 16,745.96

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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.