Home / 11,138.64-16,706.68-2,931.28

Finding the Fourth Proportional to 11,138.64, 16,706.68 and 2,931.28

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Solution

The fourth proportional to 11,138.64, 16,706.68 and 2,931.28 is: 4,396.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,138.64 : 16,706.68 = 2,931.28 : x
  2. Step 2: Convert to fraction form
    11,138.64/16,706.68 = 2,931.28/x
  3. Step 3: Cross multiply
    11,138.64x = 16,706.68 × 2,931.28
  4. Step 4: Simplify right side
    11,138.64x = 48,971,956.95
  5. Step 5: Solve for x
    x = 48,971,956.95/11,138.64
  6. Step 6: Final answer
    x = 4,396.58

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.