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Finding the Fourth Proportional to 7,223.50, 10,839.60 and 3,119.50

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Solution

The fourth proportional to 7,223.50, 10,839.60 and 3,119.50 is: 4,681.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,223.50 : 10,839.60 = 3,119.50 : x
  2. Step 2: Convert to fraction form
    7,223.50/10,839.60 = 3,119.50/x
  3. Step 3: Cross multiply
    7,223.50x = 10,839.60 × 3,119.50
  4. Step 4: Simplify right side
    7,223.50x = 33,814,132.20
  5. Step 5: Solve for x
    x = 33,814,132.20/7,223.50
  6. Step 6: Final answer
    x = 4,681.13

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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.