Home / 21,706.48-29,956.32-12,147.20

Finding the Fourth Proportional to 21,706.48, 29,956.32 and 12,147.20

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Solution

The fourth proportional to 21,706.48, 29,956.32 and 12,147.20 is: 16,763.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,706.48 : 29,956.32 = 12,147.20 : x
  2. Step 2: Convert to fraction form
    21,706.48/29,956.32 = 12,147.20/x
  3. Step 3: Cross multiply
    21,706.48x = 29,956.32 × 12,147.20
  4. Step 4: Simplify right side
    21,706.48x = 363,885,410.30
  5. Step 5: Solve for x
    x = 363,885,410.30/21,706.48
  6. Step 6: Final answer
    x = 16,763.91

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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.