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Finding the Fourth Proportional to 9,292.49, 12,805.91 and 9,121.67

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Solution

The fourth proportional to 9,292.49, 12,805.91 and 9,121.67 is: 12,570.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,292.49 : 12,805.91 = 9,121.67 : x
  2. Step 2: Convert to fraction form
    9,292.49/12,805.91 = 9,121.67/x
  3. Step 3: Cross multiply
    9,292.49x = 12,805.91 × 9,121.67
  4. Step 4: Simplify right side
    9,292.49x = 116,811,344.99
  5. Step 5: Solve for x
    x = 116,811,344.99/9,292.49
  6. Step 6: Final answer
    x = 12,570.51

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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.