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Finding the Fourth Proportional to 13,907.40, 20,879.36 and 8,295.36

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Solution

The fourth proportional to 13,907.40, 20,879.36 and 8,295.36 is: 12,453.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,907.40 : 20,879.36 = 8,295.36 : x
  2. Step 2: Convert to fraction form
    13,907.40/20,879.36 = 8,295.36/x
  3. Step 3: Cross multiply
    13,907.40x = 20,879.36 × 8,295.36
  4. Step 4: Simplify right side
    13,907.40x = 173,201,807.77
  5. Step 5: Solve for x
    x = 173,201,807.77/13,907.40
  6. Step 6: Final answer
    x = 12,453.93

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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.