Home / 12,415.20-17,131.08-7,379.31

Finding the Fourth Proportional to 12,415.20, 17,131.08 and 7,379.31

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Solution

The fourth proportional to 12,415.20, 17,131.08 and 7,379.31 is: 10,182.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,415.20 : 17,131.08 = 7,379.31 : x
  2. Step 2: Convert to fraction form
    12,415.20/17,131.08 = 7,379.31/x
  3. Step 3: Cross multiply
    12,415.20x = 17,131.08 × 7,379.31
  4. Step 4: Simplify right side
    12,415.20x = 126,415,549.95
  5. Step 5: Solve for x
    x = 126,415,549.95/12,415.20
  6. Step 6: Final answer
    x = 10,182.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.