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Finding the Fourth Proportional to 18,717.64, 28,072.62 and 7,030.60

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Solution

The fourth proportional to 18,717.64, 28,072.62 and 7,030.60 is: 10,544.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,717.64 : 28,072.62 = 7,030.60 : x
  2. Step 2: Convert to fraction form
    18,717.64/28,072.62 = 7,030.60/x
  3. Step 3: Cross multiply
    18,717.64x = 28,072.62 × 7,030.60
  4. Step 4: Simplify right side
    18,717.64x = 197,367,362.17
  5. Step 5: Solve for x
    x = 197,367,362.17/18,717.64
  6. Step 6: Final answer
    x = 10,544.46

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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.