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Finding the Fourth Proportional to 6,928, 9,560.64 and 3,784.20

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Solution

The fourth proportional to 6,928, 9,560.64 and 3,784.20 is: 5,222.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,928 : 9,560.64 = 3,784.20 : x
  2. Step 2: Convert to fraction form
    6,928/9,560.64 = 3,784.20/x
  3. Step 3: Cross multiply
    6,928x = 9,560.64 × 3,784.20
  4. Step 4: Simplify right side
    6,928x = 36,179,373.89
  5. Step 5: Solve for x
    x = 36,179,373.89/6,928
  6. Step 6: Final answer
    x = 5,222.20

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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.