Home / 20,159.08-27,812.16-12,198.40

Finding the Fourth Proportional to 20,159.08, 27,812.16 and 12,198.40

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Solution

The fourth proportional to 20,159.08, 27,812.16 and 12,198.40 is: 16,829.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,159.08 : 27,812.16 = 12,198.40 : x
  2. Step 2: Convert to fraction form
    20,159.08/27,812.16 = 12,198.40/x
  3. Step 3: Cross multiply
    20,159.08x = 27,812.16 × 12,198.40
  4. Step 4: Simplify right side
    20,159.08x = 339,263,852.54
  5. Step 5: Solve for x
    x = 339,263,852.54/20,159.08
  6. Step 6: Final answer
    x = 16,829.33

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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.