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Finding the Fourth Proportional to 15,670.80, 21,625.20 and 8,596.80

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Solution

The fourth proportional to 15,670.80, 21,625.20 and 8,596.80 is: 11,863.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,670.80 : 21,625.20 = 8,596.80 : x
  2. Step 2: Convert to fraction form
    15,670.80/21,625.20 = 8,596.80/x
  3. Step 3: Cross multiply
    15,670.80x = 21,625.20 × 8,596.80
  4. Step 4: Simplify right side
    15,670.80x = 185,907,519.36
  5. Step 5: Solve for x
    x = 185,907,519.36/15,670.80
  6. Step 6: Final answer
    x = 11,863.31

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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.