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Finding the Fourth Proportional to 12,879.12, 19,321.52 and 7,335.08

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Solution

The fourth proportional to 12,879.12, 19,321.52 and 7,335.08 is: 11,004.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,879.12 : 19,321.52 = 7,335.08 : x
  2. Step 2: Convert to fraction form
    12,879.12/19,321.52 = 7,335.08/x
  3. Step 3: Cross multiply
    12,879.12x = 19,321.52 × 7,335.08
  4. Step 4: Simplify right side
    12,879.12x = 141,724,894.92
  5. Step 5: Solve for x
    x = 141,724,894.92/12,879.12
  6. Step 6: Final answer
    x = 11,004.24

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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.