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Finding the Fourth Proportional to 7,235.64, 9,985.35 and 4,092

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Solution

The fourth proportional to 7,235.64, 9,985.35 and 4,092 is: 5,647.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,235.64 : 9,985.35 = 4,092 : x
  2. Step 2: Convert to fraction form
    7,235.64/9,985.35 = 4,092/x
  3. Step 3: Cross multiply
    7,235.64x = 9,985.35 × 4,092
  4. Step 4: Simplify right side
    7,235.64x = 40,860,052.20
  5. Step 5: Solve for x
    x = 40,860,052.20/7,235.64
  6. Step 6: Final answer
    x = 5,647.05

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.