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Finding the Fourth Proportional to 13,907.66, 20,760.32 and 12,879.77

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Solution

The fourth proportional to 13,907.66, 20,760.32 and 12,879.77 is: 19,225.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,907.66 : 20,760.32 = 12,879.77 : x
  2. Step 2: Convert to fraction form
    13,907.66/20,760.32 = 12,879.77/x
  3. Step 3: Cross multiply
    13,907.66x = 20,760.32 × 12,879.77
  4. Step 4: Simplify right side
    13,907.66x = 267,388,075.12
  5. Step 5: Solve for x
    x = 267,388,075.12/13,907.66
  6. Step 6: Final answer
    x = 19,225.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.