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Finding the Fourth Proportional to 21,684.96, 29,926.08 and 12,252.96

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Solution

The fourth proportional to 21,684.96, 29,926.08 and 12,252.96 is: 16,909.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,684.96 : 29,926.08 = 12,252.96 : x
  2. Step 2: Convert to fraction form
    21,684.96/29,926.08 = 12,252.96/x
  3. Step 3: Cross multiply
    21,684.96x = 29,926.08 × 12,252.96
  4. Step 4: Simplify right side
    21,684.96x = 366,683,061.20
  5. Step 5: Solve for x
    x = 366,683,061.20/21,684.96
  6. Step 6: Final answer
    x = 16,909.56

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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.