Home / 7,819.72-11,719.86-3,439.24

Finding the Fourth Proportional to 7,819.72, 11,719.86 and 3,439.24

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Solution

The fourth proportional to 7,819.72, 11,719.86 and 3,439.24 is: 5,154.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,819.72 : 11,719.86 = 3,439.24 : x
  2. Step 2: Convert to fraction form
    7,819.72/11,719.86 = 3,439.24/x
  3. Step 3: Cross multiply
    7,819.72x = 11,719.86 × 3,439.24
  4. Step 4: Simplify right side
    7,819.72x = 40,307,411.31
  5. Step 5: Solve for x
    x = 40,307,411.31/7,819.72
  6. Step 6: Final answer
    x = 5,154.58

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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.