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Finding the Fourth Proportional to 9,921, 14,881.56 and 3,765

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Solution

The fourth proportional to 9,921, 14,881.56 and 3,765 is: 5,647.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,921 : 14,881.56 = 3,765 : x
  2. Step 2: Convert to fraction form
    9,921/14,881.56 = 3,765/x
  3. Step 3: Cross multiply
    9,921x = 14,881.56 × 3,765
  4. Step 4: Simplify right side
    9,921x = 56,029,073.40
  5. Step 5: Solve for x
    x = 56,029,073.40/9,921
  6. Step 6: Final answer
    x = 5,647.52

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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.