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Finding the Fourth Proportional to 18,731.76, 28,076.04 and 7,037.52

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Solution

The fourth proportional to 18,731.76, 28,076.04 and 7,037.52 is: 10,548.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,731.76 : 28,076.04 = 7,037.52 : x
  2. Step 2: Convert to fraction form
    18,731.76/28,076.04 = 7,037.52/x
  3. Step 3: Cross multiply
    18,731.76x = 28,076.04 × 7,037.52
  4. Step 4: Simplify right side
    18,731.76x = 197,585,693.02
  5. Step 5: Solve for x
    x = 197,585,693.02/18,731.76
  6. Step 6: Final answer
    x = 10,548.16

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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.