Home / 21,170.92-31,747.10-11,307.96

Finding the Fourth Proportional to 21,170.92, 31,747.10 and 11,307.96

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Solution

The fourth proportional to 21,170.92, 31,747.10 and 11,307.96 is: 16,956.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,170.92 : 31,747.10 = 11,307.96 : x
  2. Step 2: Convert to fraction form
    21,170.92/31,747.10 = 11,307.96/x
  3. Step 3: Cross multiply
    21,170.92x = 31,747.10 × 11,307.96
  4. Step 4: Simplify right side
    21,170.92x = 358,994,936.92
  5. Step 5: Solve for x
    x = 358,994,936.92/21,170.92
  6. Step 6: Final answer
    x = 16,956.98

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1.5x scale

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.