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Finding the Fourth Proportional to 18,605.33, 27,878.81 and 15,820.55

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Solution

The fourth proportional to 18,605.33, 27,878.81 and 15,820.55 is: 23,706.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,605.33 : 27,878.81 = 15,820.55 : x
  2. Step 2: Convert to fraction form
    18,605.33/27,878.81 = 15,820.55/x
  3. Step 3: Cross multiply
    18,605.33x = 27,878.81 × 15,820.55
  4. Step 4: Simplify right side
    18,605.33x = 441,057,968.15
  5. Step 5: Solve for x
    x = 441,057,968.15/18,605.33
  6. Step 6: Final answer
    x = 23,706.01

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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.