Home / 21,732.84-29,989.62-12,780.68

Finding the Fourth Proportional to 21,732.84, 29,989.62 and 12,780.68

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Solution

The fourth proportional to 21,732.84, 29,989.62 and 12,780.68 is: 17,636.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,732.84 : 29,989.62 = 12,780.68 : x
  2. Step 2: Convert to fraction form
    21,732.84/29,989.62 = 12,780.68/x
  3. Step 3: Cross multiply
    21,732.84x = 29,989.62 × 12,780.68
  4. Step 4: Simplify right side
    21,732.84x = 383,287,736.54
  5. Step 5: Solve for x
    x = 383,287,736.54/21,732.84
  6. Step 6: Final answer
    x = 17,636.34

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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.