Home / 7,836.90-10,815.49-5,179.70

Finding the Fourth Proportional to 7,836.90, 10,815.49 and 5,179.70

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Solution

The fourth proportional to 7,836.90, 10,815.49 and 5,179.70 is: 7,148.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,836.90 : 10,815.49 = 5,179.70 : x
  2. Step 2: Convert to fraction form
    7,836.90/10,815.49 = 5,179.70/x
  3. Step 3: Cross multiply
    7,836.90x = 10,815.49 × 5,179.70
  4. Step 4: Simplify right side
    7,836.90x = 56,020,993.55
  5. Step 5: Solve for x
    x = 56,020,993.55/7,836.90
  6. Step 6: Final answer
    x = 7,148.36

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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.