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Finding the Fourth Proportional to 7,145.72, 10,719.19 and 1,951.59

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Solution

The fourth proportional to 7,145.72, 10,719.19 and 1,951.59 is: 2,927.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,145.72 : 10,719.19 = 1,951.59 : x
  2. Step 2: Convert to fraction form
    7,145.72/10,719.19 = 1,951.59/x
  3. Step 3: Cross multiply
    7,145.72x = 10,719.19 × 1,951.59
  4. Step 4: Simplify right side
    7,145.72x = 20,919,495.67
  5. Step 5: Solve for x
    x = 20,919,495.67/7,145.72
  6. Step 6: Final answer
    x = 2,927.56

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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.