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Finding the Fourth Proportional to 9,910.70, 13,653.78 and 6,921.80

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Solution

The fourth proportional to 9,910.70, 13,653.78 and 6,921.80 is: 9,536.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,910.70 : 13,653.78 = 6,921.80 : x
  2. Step 2: Convert to fraction form
    9,910.70/13,653.78 = 6,921.80/x
  3. Step 3: Cross multiply
    9,910.70x = 13,653.78 × 6,921.80
  4. Step 4: Simplify right side
    9,910.70x = 94,508,734.40
  5. Step 5: Solve for x
    x = 94,508,734.40/9,910.70
  6. Step 6: Final answer
    x = 9,536.03

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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.