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Finding the Fourth Proportional to 18,821.33, 28,235.06 and 7,725.03

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Solution

The fourth proportional to 18,821.33, 28,235.06 and 7,725.03 is: 11,588.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,821.33 : 28,235.06 = 7,725.03 : x
  2. Step 2: Convert to fraction form
    18,821.33/28,235.06 = 7,725.03/x
  3. Step 3: Cross multiply
    18,821.33x = 28,235.06 × 7,725.03
  4. Step 4: Simplify right side
    18,821.33x = 218,116,646.93
  5. Step 5: Solve for x
    x = 218,116,646.93/18,821.33
  6. Step 6: Final answer
    x = 11,588.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.