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Finding the Fourth Proportional to 18,710.46, 28,060.20 and 7,020.99

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Solution

The fourth proportional to 18,710.46, 28,060.20 and 7,020.99 is: 10,529.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,710.46 : 28,060.20 = 7,020.99 : x
  2. Step 2: Convert to fraction form
    18,710.46/28,060.20 = 7,020.99/x
  3. Step 3: Cross multiply
    18,710.46x = 28,060.20 × 7,020.99
  4. Step 4: Simplify right side
    18,710.46x = 197,010,383.60
  5. Step 5: Solve for x
    x = 197,010,383.60/18,710.46
  6. Step 6: Final answer
    x = 10,529.42

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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.