Home / 12,879.32-19,323.18-5,490.05

Finding the Fourth Proportional to 12,879.32, 19,323.18 and 5,490.05

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Solution

The fourth proportional to 12,879.32, 19,323.18 and 5,490.05 is: 8,236.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,879.32 : 19,323.18 = 5,490.05 : x
  2. Step 2: Convert to fraction form
    12,879.32/19,323.18 = 5,490.05/x
  3. Step 3: Cross multiply
    12,879.32x = 19,323.18 × 5,490.05
  4. Step 4: Simplify right side
    12,879.32x = 106,085,127.74
  5. Step 5: Solve for x
    x = 106,085,127.74/12,879.32
  6. Step 6: Final answer
    x = 8,236.86

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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.