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Finding the Fourth Proportional to 9,292.45, 12,805.86 and 9,121.65

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Solution

The fourth proportional to 9,292.45, 12,805.86 and 9,121.65 is: 12,570.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,292.45 : 12,805.86 = 9,121.65 : x
  2. Step 2: Convert to fraction form
    9,292.45/12,805.86 = 9,121.65/x
  3. Step 3: Cross multiply
    9,292.45x = 12,805.86 × 9,121.65
  4. Step 4: Simplify right side
    9,292.45x = 116,810,572.87
  5. Step 5: Solve for x
    x = 116,810,572.87/9,292.45
  6. Step 6: Final answer
    x = 12,570.49

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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.