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Finding the Fourth Proportional to 43,681.80, 65,467.86 and 18,692.46

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Solution

The fourth proportional to 43,681.80, 65,467.86 and 18,692.46 is: 28,015.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,681.80 : 65,467.86 = 18,692.46 : x
  2. Step 2: Convert to fraction form
    43,681.80/65,467.86 = 18,692.46/x
  3. Step 3: Cross multiply
    43,681.80x = 65,467.86 × 18,692.46
  4. Step 4: Simplify right side
    43,681.80x = 1,223,755,354.34
  5. Step 5: Solve for x
    x = 1,223,755,354.34/43,681.80
  6. Step 6: Final answer
    x = 28,015.22

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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.