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Finding the Fourth Proportional to 21,602.84, 29,809.62 and 12,169.58

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Solution

The fourth proportional to 21,602.84, 29,809.62 and 12,169.58 is: 16,792.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,602.84 : 29,809.62 = 12,169.58 : x
  2. Step 2: Convert to fraction form
    21,602.84/29,809.62 = 12,169.58/x
  3. Step 3: Cross multiply
    21,602.84x = 29,809.62 × 12,169.58
  4. Step 4: Simplify right side
    21,602.84x = 362,770,555.36
  5. Step 5: Solve for x
    x = 362,770,555.36/21,602.84
  6. Step 6: Final answer
    x = 16,792.73

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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.