Home / 19,380.78-26,738.58-12,670.26

Finding the Fourth Proportional to 19,380.78, 26,738.58 and 12,670.26

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Solution

The fourth proportional to 19,380.78, 26,738.58 and 12,670.26 is: 17,480.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,380.78 : 26,738.58 = 12,670.26 : x
  2. Step 2: Convert to fraction form
    19,380.78/26,738.58 = 12,670.26/x
  3. Step 3: Cross multiply
    19,380.78x = 26,738.58 × 12,670.26
  4. Step 4: Simplify right side
    19,380.78x = 338,784,760.63
  5. Step 5: Solve for x
    x = 338,784,760.63/19,380.78
  6. Step 6: Final answer
    x = 17,480.45

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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.