Home / 19,845.78-27,388.60-13,119.72

Finding the Fourth Proportional to 19,845.78, 27,388.60 and 13,119.72

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Solution

The fourth proportional to 19,845.78, 27,388.60 and 13,119.72 is: 18,106.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,845.78 : 27,388.60 = 13,119.72 : x
  2. Step 2: Convert to fraction form
    19,845.78/27,388.60 = 13,119.72/x
  3. Step 3: Cross multiply
    19,845.78x = 27,388.60 × 13,119.72
  4. Step 4: Simplify right side
    19,845.78x = 359,330,763.19
  5. Step 5: Solve for x
    x = 359,330,763.19/19,845.78
  6. Step 6: Final answer
    x = 18,106.15

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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.