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Finding the Fourth Proportional to 43,486.70, 65,238.42 and 18,526.28

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Solution

The fourth proportional to 43,486.70, 65,238.42 and 18,526.28 is: 27,792.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,486.70 : 65,238.42 = 18,526.28 : x
  2. Step 2: Convert to fraction form
    43,486.70/65,238.42 = 18,526.28/x
  3. Step 3: Cross multiply
    43,486.70x = 65,238.42 × 18,526.28
  4. Step 4: Simplify right side
    43,486.70x = 1,208,625,235.68
  5. Step 5: Solve for x
    x = 1,208,625,235.68/43,486.70
  6. Step 6: Final answer
    x = 27,792.99

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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.