Home / 20,609.19-28,439.07-12,111.64

Finding the Fourth Proportional to 20,609.19, 28,439.07 and 12,111.64

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Solution

The fourth proportional to 20,609.19, 28,439.07 and 12,111.64 is: 16,713.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,609.19 : 28,439.07 = 12,111.64 : x
  2. Step 2: Convert to fraction form
    20,609.19/28,439.07 = 12,111.64/x
  3. Step 3: Cross multiply
    20,609.19x = 28,439.07 × 12,111.64
  4. Step 4: Simplify right side
    20,609.19x = 344,443,706.68
  5. Step 5: Solve for x
    x = 344,443,706.68/20,609.19
  6. Step 6: Final answer
    x = 16,713.11

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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.