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Finding the Fourth Proportional to 43,486.70, 65,248.62 and 18,538.50

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Solution

The fourth proportional to 43,486.70, 65,248.62 and 18,538.50 is: 27,815.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,486.70 : 65,248.62 = 18,538.50 : x
  2. Step 2: Convert to fraction form
    43,486.70/65,248.62 = 18,538.50/x
  3. Step 3: Cross multiply
    43,486.70x = 65,248.62 × 18,538.50
  4. Step 4: Simplify right side
    43,486.70x = 1,209,611,541.87
  5. Step 5: Solve for x
    x = 1,209,611,541.87/43,486.70
  6. Step 6: Final answer
    x = 27,815.66

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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.