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Finding the Fourth Proportional to 17,997.60, 26,978.48 and 8,620.32

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Solution

The fourth proportional to 17,997.60, 26,978.48 and 8,620.32 is: 12,921.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,997.60 : 26,978.48 = 8,620.32 : x
  2. Step 2: Convert to fraction form
    17,997.60/26,978.48 = 8,620.32/x
  3. Step 3: Cross multiply
    17,997.60x = 26,978.48 × 8,620.32
  4. Step 4: Simplify right side
    17,997.60x = 232,563,130.71
  5. Step 5: Solve for x
    x = 232,563,130.71/17,997.60
  6. Step 6: Final answer
    x = 12,921.90

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1.5x scale

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.