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Finding the Fourth Proportional to 7,771.84, 10,721.72 and 5,253.03

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Solution

The fourth proportional to 7,771.84, 10,721.72 and 5,253.03 is: 7,246.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,771.84 : 10,721.72 = 5,253.03 : x
  2. Step 2: Convert to fraction form
    7,771.84/10,721.72 = 5,253.03/x
  3. Step 3: Cross multiply
    7,771.84x = 10,721.72 × 5,253.03
  4. Step 4: Simplify right side
    7,771.84x = 56,321,516.81
  5. Step 5: Solve for x
    x = 56,321,516.81/7,771.84
  6. Step 6: Final answer
    x = 7,246.87

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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.