Home / 13,907.43-19,185.82-12,315.70

Finding the Fourth Proportional to 13,907.43, 19,185.82 and 12,315.70

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Solution

The fourth proportional to 13,907.43, 19,185.82 and 12,315.70 is: 16,989.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,907.43 : 19,185.82 = 12,315.70 : x
  2. Step 2: Convert to fraction form
    13,907.43/19,185.82 = 12,315.70/x
  3. Step 3: Cross multiply
    13,907.43x = 19,185.82 × 12,315.70
  4. Step 4: Simplify right side
    13,907.43x = 236,286,803.37
  5. Step 5: Solve for x
    x = 236,286,803.37/13,907.43
  6. Step 6: Final answer
    x = 16,989.97

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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.