Home / 12,913.70-19,378.74-5,518.22

Finding the Fourth Proportional to 12,913.70, 19,378.74 and 5,518.22

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Solution

The fourth proportional to 12,913.70, 19,378.74 and 5,518.22 is: 8,280.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,913.70 : 19,378.74 = 5,518.22 : x
  2. Step 2: Convert to fraction form
    12,913.70/19,378.74 = 5,518.22/x
  3. Step 3: Cross multiply
    12,913.70x = 19,378.74 × 5,518.22
  4. Step 4: Simplify right side
    12,913.70x = 106,936,150.64
  5. Step 5: Solve for x
    x = 106,936,150.64/12,913.70
  6. Step 6: Final answer
    x = 8,280.83

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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.