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Finding the Fourth Proportional to 38,978.58, 58,467.74 and 14,018.58

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Solution

The fourth proportional to 38,978.58, 58,467.74 and 14,018.58 is: 21,027.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,978.58 : 58,467.74 = 14,018.58 : x
  2. Step 2: Convert to fraction form
    38,978.58/58,467.74 = 14,018.58/x
  3. Step 3: Cross multiply
    38,978.58x = 58,467.74 × 14,018.58
  4. Step 4: Simplify right side
    38,978.58x = 819,634,907.45
  5. Step 5: Solve for x
    x = 819,634,907.45/38,978.58
  6. Step 6: Final answer
    x = 21,027.83

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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.