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Finding the Fourth Proportional to 18,879.32, 26,040.72 and 14,392.64

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Solution

The fourth proportional to 18,879.32, 26,040.72 and 14,392.64 is: 19,852.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,879.32 : 26,040.72 = 14,392.64 : x
  2. Step 2: Convert to fraction form
    18,879.32/26,040.72 = 14,392.64/x
  3. Step 3: Cross multiply
    18,879.32x = 26,040.72 × 14,392.64
  4. Step 4: Simplify right side
    18,879.32x = 374,794,708.30
  5. Step 5: Solve for x
    x = 374,794,708.30/18,879.32
  6. Step 6: Final answer
    x = 19,852.13

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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.