Home / 13,867.12-20,782.54-12,107.68

Finding the Fourth Proportional to 13,867.12, 20,782.54 and 12,107.68

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Solution

The fourth proportional to 13,867.12, 20,782.54 and 12,107.68 is: 18,145.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,867.12 : 20,782.54 = 12,107.68 : x
  2. Step 2: Convert to fraction form
    13,867.12/20,782.54 = 12,107.68/x
  3. Step 3: Cross multiply
    13,867.12x = 20,782.54 × 12,107.68
  4. Step 4: Simplify right side
    13,867.12x = 251,628,343.91
  5. Step 5: Solve for x
    x = 251,628,343.91/13,867.12
  6. Step 6: Final answer
    x = 18,145.68

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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.