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Finding the Fourth Proportional to 18,715.02, 28,084.08 and 8,718

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Solution

The fourth proportional to 18,715.02, 28,084.08 and 8,718 is: 13,082.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,715.02 : 28,084.08 = 8,718 : x
  2. Step 2: Convert to fraction form
    18,715.02/28,084.08 = 8,718/x
  3. Step 3: Cross multiply
    18,715.02x = 28,084.08 × 8,718
  4. Step 4: Simplify right side
    18,715.02x = 244,837,009.44
  5. Step 5: Solve for x
    x = 244,837,009.44/18,715.02
  6. Step 6: Final answer
    x = 13,082.38

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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.