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Finding the Fourth Proportional to 9,370.98, 12,933.09 and 7,128.90

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Solution

The fourth proportional to 9,370.98, 12,933.09 and 7,128.90 is: 9,838.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,370.98 : 12,933.09 = 7,128.90 : x
  2. Step 2: Convert to fraction form
    9,370.98/12,933.09 = 7,128.90/x
  3. Step 3: Cross multiply
    9,370.98x = 12,933.09 × 7,128.90
  4. Step 4: Simplify right side
    9,370.98x = 92,198,705.30
  5. Step 5: Solve for x
    x = 92,198,705.30/9,370.98
  6. Step 6: Final answer
    x = 9,838.75

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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.