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Finding the Fourth Proportional to 7,680.94, 11,525.01 and 3,981.16

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Solution

The fourth proportional to 7,680.94, 11,525.01 and 3,981.16 is: 5,973.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,680.94 : 11,525.01 = 3,981.16 : x
  2. Step 2: Convert to fraction form
    7,680.94/11,525.01 = 3,981.16/x
  3. Step 3: Cross multiply
    7,680.94x = 11,525.01 × 3,981.16
  4. Step 4: Simplify right side
    7,680.94x = 45,882,908.81
  5. Step 5: Solve for x
    x = 45,882,908.81/7,680.94
  6. Step 6: Final answer
    x = 5,973.61

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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.