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Finding the Fourth Proportional to 9,905.66, 14,755.28 and 9,379.75

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Solution

The fourth proportional to 9,905.66, 14,755.28 and 9,379.75 is: 13,971.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,905.66 : 14,755.28 = 9,379.75 : x
  2. Step 2: Convert to fraction form
    9,905.66/14,755.28 = 9,379.75/x
  3. Step 3: Cross multiply
    9,905.66x = 14,755.28 × 9,379.75
  4. Step 4: Simplify right side
    9,905.66x = 138,400,753.79
  5. Step 5: Solve for x
    x = 138,400,753.79/9,905.66
  6. Step 6: Final answer
    x = 13,971.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.