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Finding the Fourth Proportional to 7,172.76, 9,898.22 and 3,986.06

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Solution

The fourth proportional to 7,172.76, 9,898.22 and 3,986.06 is: 5,500.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,172.76 : 9,898.22 = 3,986.06 : x
  2. Step 2: Convert to fraction form
    7,172.76/9,898.22 = 3,986.06/x
  3. Step 3: Cross multiply
    7,172.76x = 9,898.22 × 3,986.06
  4. Step 4: Simplify right side
    7,172.76x = 39,454,898.81
  5. Step 5: Solve for x
    x = 39,454,898.81/7,172.76
  6. Step 6: Final answer
    x = 5,500.66

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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.