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Finding the Fourth Proportional to 19,803.15, 29,703.65 and 6,654.15

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Solution

The fourth proportional to 19,803.15, 29,703.65 and 6,654.15 is: 9,980.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,803.15 : 29,703.65 = 6,654.15 : x
  2. Step 2: Convert to fraction form
    19,803.15/29,703.65 = 6,654.15/x
  3. Step 3: Cross multiply
    19,803.15x = 29,703.65 × 6,654.15
  4. Step 4: Simplify right side
    19,803.15x = 197,652,509.38
  5. Step 5: Solve for x
    x = 197,652,509.38/19,803.15
  6. Step 6: Final answer
    x = 9,980.86

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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.