Home / 15,415.62-21,257.64-13,184.88

Finding the Fourth Proportional to 15,415.62, 21,257.64 and 13,184.88

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Solution

The fourth proportional to 15,415.62, 21,257.64 and 13,184.88 is: 18,181.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,415.62 : 21,257.64 = 13,184.88 : x
  2. Step 2: Convert to fraction form
    15,415.62/21,257.64 = 13,184.88/x
  3. Step 3: Cross multiply
    15,415.62x = 21,257.64 × 13,184.88
  4. Step 4: Simplify right side
    15,415.62x = 280,279,352.77
  5. Step 5: Solve for x
    x = 280,279,352.77/15,415.62
  6. Step 6: Final answer
    x = 18,181.52

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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.