Home / 21,087.21-29,100.38-12,134.53

Finding the Fourth Proportional to 21,087.21, 29,100.38 and 12,134.53

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Solution

The fourth proportional to 21,087.21, 29,100.38 and 12,134.53 is: 16,745.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,087.21 : 29,100.38 = 12,134.53 : x
  2. Step 2: Convert to fraction form
    21,087.21/29,100.38 = 12,134.53/x
  3. Step 3: Cross multiply
    21,087.21x = 29,100.38 × 12,134.53
  4. Step 4: Simplify right side
    21,087.21x = 353,119,434.12
  5. Step 5: Solve for x
    x = 353,119,434.12/21,087.21
  6. Step 6: Final answer
    x = 16,745.67

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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.