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Finding the Fourth Proportional to 7,145.92, 10,719.54 and 1,880.92

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Solution

The fourth proportional to 7,145.92, 10,719.54 and 1,880.92 is: 2,821.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,145.92 : 10,719.54 = 1,880.92 : x
  2. Step 2: Convert to fraction form
    7,145.92/10,719.54 = 1,880.92/x
  3. Step 3: Cross multiply
    7,145.92x = 10,719.54 × 1,880.92
  4. Step 4: Simplify right side
    7,145.92x = 20,162,610.58
  5. Step 5: Solve for x
    x = 20,162,610.58/7,145.92
  6. Step 6: Final answer
    x = 2,821.56

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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.