Home / 2,113.56-3,163.68-1,289.16

Finding the Fourth Proportional to 2,113.56, 3,163.68 and 1,289.16

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Solution

The fourth proportional to 2,113.56, 3,163.68 and 1,289.16 is: 1,929.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,113.56 : 3,163.68 = 1,289.16 : x
  2. Step 2: Convert to fraction form
    2,113.56/3,163.68 = 1,289.16/x
  3. Step 3: Cross multiply
    2,113.56x = 3,163.68 × 1,289.16
  4. Step 4: Simplify right side
    2,113.56x = 4,078,489.71
  5. Step 5: Solve for x
    x = 4,078,489.71/2,113.56
  6. Step 6: Final answer
    x = 1,929.68

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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.