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Finding the Fourth Proportional to 28,188, 42,297.54 and 15,715.02

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Solution

The fourth proportional to 28,188, 42,297.54 and 15,715.02 is: 23,581.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,188 : 42,297.54 = 15,715.02 : x
  2. Step 2: Convert to fraction form
    28,188/42,297.54 = 15,715.02/x
  3. Step 3: Cross multiply
    28,188x = 42,297.54 × 15,715.02
  4. Step 4: Simplify right side
    28,188x = 664,706,687.05
  5. Step 5: Solve for x
    x = 664,706,687.05/28,188
  6. Step 6: Final answer
    x = 23,581.19

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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.