Home / 20,971.32-28,940.62-12,018.64

Finding the Fourth Proportional to 20,971.32, 28,940.62 and 12,018.64

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Solution

The fourth proportional to 20,971.32, 28,940.62 and 12,018.64 is: 16,585.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,971.32 : 28,940.62 = 12,018.64 : x
  2. Step 2: Convert to fraction form
    20,971.32/28,940.62 = 12,018.64/x
  3. Step 3: Cross multiply
    20,971.32x = 28,940.62 × 12,018.64
  4. Step 4: Simplify right side
    20,971.32x = 347,826,893.16
  5. Step 5: Solve for x
    x = 347,826,893.16/20,971.32
  6. Step 6: Final answer
    x = 16,585.84

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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.