Home / 13,687.25-18,888.41-7,399.63

Finding the Fourth Proportional to 13,687.25, 18,888.41 and 7,399.63

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Solution

The fourth proportional to 13,687.25, 18,888.41 and 7,399.63 is: 10,211.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,687.25 : 18,888.41 = 7,399.63 : x
  2. Step 2: Convert to fraction form
    13,687.25/18,888.41 = 7,399.63/x
  3. Step 3: Cross multiply
    13,687.25x = 18,888.41 × 7,399.63
  4. Step 4: Simplify right side
    13,687.25x = 139,767,113.85
  5. Step 5: Solve for x
    x = 139,767,113.85/13,687.25
  6. Step 6: Final answer
    x = 10,211.48

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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.