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Finding the Fourth Proportional to 9,999.21, 14,995.39 and 7,217.63

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Solution

The fourth proportional to 9,999.21, 14,995.39 and 7,217.63 is: 10,823.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,999.21 : 14,995.39 = 7,217.63 : x
  2. Step 2: Convert to fraction form
    9,999.21/14,995.39 = 7,217.63/x
  3. Step 3: Cross multiply
    9,999.21x = 14,995.39 × 7,217.63
  4. Step 4: Simplify right side
    9,999.21x = 108,231,176.73
  5. Step 5: Solve for x
    x = 108,231,176.73/9,999.21
  6. Step 6: Final answer
    x = 10,823.97

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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.