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Finding the Fourth Proportional to 18,783.90, 25,922.22 and 10,286.04

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Solution

The fourth proportional to 18,783.90, 25,922.22 and 10,286.04 is: 14,194.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,783.90 : 25,922.22 = 10,286.04 : x
  2. Step 2: Convert to fraction form
    18,783.90/25,922.22 = 10,286.04/x
  3. Step 3: Cross multiply
    18,783.90x = 25,922.22 × 10,286.04
  4. Step 4: Simplify right side
    18,783.90x = 266,636,991.81
  5. Step 5: Solve for x
    x = 266,636,991.81/18,783.90
  6. Step 6: Final answer
    x = 14,194.98

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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.