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Finding the Fourth Proportional to 7,894.68, 11,839.55 and 2,628.46

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Solution

The fourth proportional to 7,894.68, 11,839.55 and 2,628.46 is: 3,941.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,894.68 : 11,839.55 = 2,628.46 : x
  2. Step 2: Convert to fraction form
    7,894.68/11,839.55 = 2,628.46/x
  3. Step 3: Cross multiply
    7,894.68x = 11,839.55 × 2,628.46
  4. Step 4: Simplify right side
    7,894.68x = 31,119,790.16
  5. Step 5: Solve for x
    x = 31,119,790.16/7,894.68
  6. Step 6: Final answer
    x = 3,941.87

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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.