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Finding the Fourth Proportional to 7,238.90, 9,989.97 and 4,445.30

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Solution

The fourth proportional to 7,238.90, 9,989.97 and 4,445.30 is: 6,134.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,238.90 : 9,989.97 = 4,445.30 : x
  2. Step 2: Convert to fraction form
    7,238.90/9,989.97 = 4,445.30/x
  3. Step 3: Cross multiply
    7,238.90x = 9,989.97 × 4,445.30
  4. Step 4: Simplify right side
    7,238.90x = 44,408,413.64
  5. Step 5: Solve for x
    x = 44,408,413.64/7,238.90
  6. Step 6: Final answer
    x = 6,134.69

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1.5x scale

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.