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Finding the Fourth Proportional to 7,768.96, 10,721.08 and 4,232.20

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Solution

The fourth proportional to 7,768.96, 10,721.08 and 4,232.20 is: 5,840.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,768.96 : 10,721.08 = 4,232.20 : x
  2. Step 2: Convert to fraction form
    7,768.96/10,721.08 = 4,232.20/x
  3. Step 3: Cross multiply
    7,768.96x = 10,721.08 × 4,232.20
  4. Step 4: Simplify right side
    7,768.96x = 45,373,754.78
  5. Step 5: Solve for x
    x = 45,373,754.78/7,768.96
  6. Step 6: Final answer
    x = 5,840.39

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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.