Home / 21,516.72-29,692.43-11,956.58

Finding the Fourth Proportional to 21,516.72, 29,692.43 and 11,956.58

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Solution

The fourth proportional to 21,516.72, 29,692.43 and 11,956.58 is: 16,499.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,516.72 : 29,692.43 = 11,956.58 : x
  2. Step 2: Convert to fraction form
    21,516.72/29,692.43 = 11,956.58/x
  3. Step 3: Cross multiply
    21,516.72x = 29,692.43 × 11,956.58
  4. Step 4: Simplify right side
    21,516.72x = 355,019,803.34
  5. Step 5: Solve for x
    x = 355,019,803.34/21,516.72
  6. Step 6: Final answer
    x = 16,499.72

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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.