Home / 21,692.21-29,935.47-12,742.58

Finding the Fourth Proportional to 21,692.21, 29,935.47 and 12,742.58

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Solution

The fourth proportional to 21,692.21, 29,935.47 and 12,742.58 is: 17,584.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,692.21 : 29,935.47 = 12,742.58 : x
  2. Step 2: Convert to fraction form
    21,692.21/29,935.47 = 12,742.58/x
  3. Step 3: Cross multiply
    21,692.21x = 29,935.47 × 12,742.58
  4. Step 4: Simplify right side
    21,692.21x = 381,455,121.31
  5. Step 5: Solve for x
    x = 381,455,121.31/21,692.21
  6. Step 6: Final answer
    x = 17,584.89

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Why These Related Problems?

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