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Finding the Fourth Proportional to 7,122.98, 10,685.70 and 2,960.70

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Solution

The fourth proportional to 7,122.98, 10,685.70 and 2,960.70 is: 4,441.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,122.98 : 10,685.70 = 2,960.70 : x
  2. Step 2: Convert to fraction form
    7,122.98/10,685.70 = 2,960.70/x
  3. Step 3: Cross multiply
    7,122.98x = 10,685.70 × 2,960.70
  4. Step 4: Simplify right side
    7,122.98x = 31,637,151.99
  5. Step 5: Solve for x
    x = 31,637,151.99/7,122.98
  6. Step 6: Final answer
    x = 4,441.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.