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Finding the Fourth Proportional to 26,978.40, 40,467.60 and 17,647.20

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Solution

The fourth proportional to 26,978.40, 40,467.60 and 17,647.20 is: 26,470.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,978.40 : 40,467.60 = 17,647.20 : x
  2. Step 2: Convert to fraction form
    26,978.40/40,467.60 = 17,647.20/x
  3. Step 3: Cross multiply
    26,978.40x = 40,467.60 × 17,647.20
  4. Step 4: Simplify right side
    26,978.40x = 714,139,830.72
  5. Step 5: Solve for x
    x = 714,139,830.72/26,978.40
  6. Step 6: Final answer
    x = 26,470.80

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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.