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Finding the Fourth Proportional to 13,938.66, 19,235.22 and 7,650.90

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Solution

The fourth proportional to 13,938.66, 19,235.22 and 7,650.90 is: 10,558.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,938.66 : 19,235.22 = 7,650.90 : x
  2. Step 2: Convert to fraction form
    13,938.66/19,235.22 = 7,650.90/x
  3. Step 3: Cross multiply
    13,938.66x = 19,235.22 × 7,650.90
  4. Step 4: Simplify right side
    13,938.66x = 147,166,744.70
  5. Step 5: Solve for x
    x = 147,166,744.70/13,938.66
  6. Step 6: Final answer
    x = 10,558.17

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.