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Finding the Fourth Proportional to 9,305.20, 13,957.80 and 7,685.20

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Solution

The fourth proportional to 9,305.20, 13,957.80 and 7,685.20 is: 11,527.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,305.20 : 13,957.80 = 7,685.20 : x
  2. Step 2: Convert to fraction form
    9,305.20/13,957.80 = 7,685.20/x
  3. Step 3: Cross multiply
    9,305.20x = 13,957.80 × 7,685.20
  4. Step 4: Simplify right side
    9,305.20x = 107,268,484.56
  5. Step 5: Solve for x
    x = 107,268,484.56/9,305.20
  6. Step 6: Final answer
    x = 11,527.80

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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.