Home / 13,868.12-20,784.06-12,108.68

Finding the Fourth Proportional to 13,868.12, 20,784.06 and 12,108.68

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Solution

The fourth proportional to 13,868.12, 20,784.06 and 12,108.68 is: 18,147.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,868.12 : 20,784.06 = 12,108.68 : x
  2. Step 2: Convert to fraction form
    13,868.12/20,784.06 = 12,108.68/x
  3. Step 3: Cross multiply
    13,868.12x = 20,784.06 × 12,108.68
  4. Step 4: Simplify right side
    13,868.12x = 251,667,531.64
  5. Step 5: Solve for x
    x = 251,667,531.64/13,868.12
  6. Step 6: Final answer
    x = 18,147.20

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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.