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Finding the Fourth Proportional to 21,628.17, 29,846.79 and 11,692.17

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Solution

The fourth proportional to 21,628.17, 29,846.79 and 11,692.17 is: 16,135.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,628.17 : 29,846.79 = 11,692.17 : x
  2. Step 2: Convert to fraction form
    21,628.17/29,846.79 = 11,692.17/x
  3. Step 3: Cross multiply
    21,628.17x = 29,846.79 × 11,692.17
  4. Step 4: Simplify right side
    21,628.17x = 348,973,742.63
  5. Step 5: Solve for x
    x = 348,973,742.63/21,628.17
  6. Step 6: Final answer
    x = 16,135.15

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1.5x scale

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.