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Finding the Fourth Proportional to 18,878.76, 28,323.41 and 7,192.89

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Solution

The fourth proportional to 18,878.76, 28,323.41 and 7,192.89 is: 10,791.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,878.76 : 28,323.41 = 7,192.89 : x
  2. Step 2: Convert to fraction form
    18,878.76/28,323.41 = 7,192.89/x
  3. Step 3: Cross multiply
    18,878.76x = 28,323.41 × 7,192.89
  4. Step 4: Simplify right side
    18,878.76x = 203,727,136.59
  5. Step 5: Solve for x
    x = 203,727,136.59/18,878.76
  6. Step 6: Final answer
    x = 10,791.34

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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.