Home / 19,109.78-28,664.66-12,534.44

Finding the Fourth Proportional to 19,109.78, 28,664.66 and 12,534.44

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Solution

The fourth proportional to 19,109.78, 28,664.66 and 12,534.44 is: 18,801.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,109.78 : 28,664.66 = 12,534.44 : x
  2. Step 2: Convert to fraction form
    19,109.78/28,664.66 = 12,534.44/x
  3. Step 3: Cross multiply
    19,109.78x = 28,664.66 × 12,534.44
  4. Step 4: Simplify right side
    19,109.78x = 359,295,460.89
  5. Step 5: Solve for x
    x = 359,295,460.89/19,109.78
  6. Step 6: Final answer
    x = 18,801.65

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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.