Home / 5,148.71-7,105.77-2,880.87

Finding the Fourth Proportional to 5,148.71, 7,105.77 and 2,880.87

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Solution

The fourth proportional to 5,148.71, 7,105.77 and 2,880.87 is: 3,975.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,148.71 : 7,105.77 = 2,880.87 : x
  2. Step 2: Convert to fraction form
    5,148.71/7,105.77 = 2,880.87/x
  3. Step 3: Cross multiply
    5,148.71x = 7,105.77 × 2,880.87
  4. Step 4: Simplify right side
    5,148.71x = 20,470,799.62
  5. Step 5: Solve for x
    x = 20,470,799.62/5,148.71
  6. Step 6: Final answer
    x = 3,975.91

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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.