Home / 18,685.44-28,009.26-12,115.80

Finding the Fourth Proportional to 18,685.44, 28,009.26 and 12,115.80

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Solution

The fourth proportional to 18,685.44, 28,009.26 and 12,115.80 is: 18,161.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,685.44 : 28,009.26 = 12,115.80 : x
  2. Step 2: Convert to fraction form
    18,685.44/28,009.26 = 12,115.80/x
  3. Step 3: Cross multiply
    18,685.44x = 28,009.26 × 12,115.80
  4. Step 4: Simplify right side
    18,685.44x = 339,354,592.31
  5. Step 5: Solve for x
    x = 339,354,592.31/18,685.44
  6. Step 6: Final answer
    x = 18,161.45

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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.