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Finding the Fourth Proportional to 19,808.86, 29,692.38 and 7,320.88

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Solution

The fourth proportional to 19,808.86, 29,692.38 and 7,320.88 is: 10,973.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,808.86 : 29,692.38 = 7,320.88 : x
  2. Step 2: Convert to fraction form
    19,808.86/29,692.38 = 7,320.88/x
  3. Step 3: Cross multiply
    19,808.86x = 29,692.38 × 7,320.88
  4. Step 4: Simplify right side
    19,808.86x = 217,374,350.89
  5. Step 5: Solve for x
    x = 217,374,350.89/19,808.86
  6. Step 6: Final answer
    x = 10,973.59

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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.