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Finding the Fourth Proportional to 18,760.51, 28,142.04 and 6,280.03

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Solution

The fourth proportional to 18,760.51, 28,142.04 and 6,280.03 is: 9,420.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,760.51 : 28,142.04 = 6,280.03 : x
  2. Step 2: Convert to fraction form
    18,760.51/28,142.04 = 6,280.03/x
  3. Step 3: Cross multiply
    18,760.51x = 28,142.04 × 6,280.03
  4. Step 4: Simplify right side
    18,760.51x = 176,732,714.75
  5. Step 5: Solve for x
    x = 176,732,714.75/18,760.51
  6. Step 6: Final answer
    x = 9,420.47

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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.