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Finding the Fourth Proportional to 18,702.76, 28,059.02 and 7,016.20

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Solution

The fourth proportional to 18,702.76, 28,059.02 and 7,016.20 is: 10,526.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,702.76 : 28,059.02 = 7,016.20 : x
  2. Step 2: Convert to fraction form
    18,702.76/28,059.02 = 7,016.20/x
  3. Step 3: Cross multiply
    18,702.76x = 28,059.02 × 7,016.20
  4. Step 4: Simplify right side
    18,702.76x = 196,867,696.12
  5. Step 5: Solve for x
    x = 196,867,696.12/18,702.76
  6. Step 6: Final answer
    x = 10,526.13

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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.