Home / 18,939.08-28,411.86-11,143.64

Finding the Fourth Proportional to 18,939.08, 28,411.86 and 11,143.64

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Solution

The fourth proportional to 18,939.08, 28,411.86 and 11,143.64 is: 16,717.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,939.08 : 28,411.86 = 11,143.64 : x
  2. Step 2: Convert to fraction form
    18,939.08/28,411.86 = 11,143.64/x
  3. Step 3: Cross multiply
    18,939.08x = 28,411.86 × 11,143.64
  4. Step 4: Simplify right side
    18,939.08x = 316,611,539.57
  5. Step 5: Solve for x
    x = 316,611,539.57/18,939.08
  6. Step 6: Final answer
    x = 16,717.37

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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.