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Finding the Fourth Proportional to 21,786.59, 30,061.95 and 12,358.19

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Solution

The fourth proportional to 21,786.59, 30,061.95 and 12,358.19 is: 17,052.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,786.59 : 30,061.95 = 12,358.19 : x
  2. Step 2: Convert to fraction form
    21,786.59/30,061.95 = 12,358.19/x
  3. Step 3: Cross multiply
    21,786.59x = 30,061.95 × 12,358.19
  4. Step 4: Simplify right side
    21,786.59x = 371,511,289.87
  5. Step 5: Solve for x
    x = 371,511,289.87/21,786.59
  6. Step 6: Final answer
    x = 17,052.29

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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.