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Finding the Fourth Proportional to 12,840.60, 19,260.90 and 5,928.60

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Solution

The fourth proportional to 12,840.60, 19,260.90 and 5,928.60 is: 8,892.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,840.60 : 19,260.90 = 5,928.60 : x
  2. Step 2: Convert to fraction form
    12,840.60/19,260.90 = 5,928.60/x
  3. Step 3: Cross multiply
    12,840.60x = 19,260.90 × 5,928.60
  4. Step 4: Simplify right side
    12,840.60x = 114,190,171.74
  5. Step 5: Solve for x
    x = 114,190,171.74/12,840.60
  6. Step 6: Final answer
    x = 8,892.90

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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.