Home / 7,639.47-11,460.56-3,940.70

Finding the Fourth Proportional to 7,639.47, 11,460.56 and 3,940.70

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Solution

The fourth proportional to 7,639.47, 11,460.56 and 3,940.70 is: 5,911.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,639.47 : 11,460.56 = 3,940.70 : x
  2. Step 2: Convert to fraction form
    7,639.47/11,460.56 = 3,940.70/x
  3. Step 3: Cross multiply
    7,639.47x = 11,460.56 × 3,940.70
  4. Step 4: Simplify right side
    7,639.47x = 45,162,551.79
  5. Step 5: Solve for x
    x = 45,162,551.79/7,639.47
  6. Step 6: Final answer
    x = 5,911.74

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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.