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Finding the Fourth Proportional to 21,190.68, 29,241.68 and 11,758.50

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Solution

The fourth proportional to 21,190.68, 29,241.68 and 11,758.50 is: 16,225.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,190.68 : 29,241.68 = 11,758.50 : x
  2. Step 2: Convert to fraction form
    21,190.68/29,241.68 = 11,758.50/x
  3. Step 3: Cross multiply
    21,190.68x = 29,241.68 × 11,758.50
  4. Step 4: Simplify right side
    21,190.68x = 343,838,235.49
  5. Step 5: Solve for x
    x = 343,838,235.49/21,190.68
  6. Step 6: Final answer
    x = 16,225.92

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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.