Home / 13,417.74-18,525.69-8,121.87

Finding the Fourth Proportional to 13,417.74, 18,525.69 and 8,121.87

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Solution

The fourth proportional to 13,417.74, 18,525.69 and 8,121.87 is: 11,213.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,417.74 : 18,525.69 = 8,121.87 : x
  2. Step 2: Convert to fraction form
    13,417.74/18,525.69 = 8,121.87/x
  3. Step 3: Cross multiply
    13,417.74x = 18,525.69 × 8,121.87
  4. Step 4: Simplify right side
    13,417.74x = 150,463,245.84
  5. Step 5: Solve for x
    x = 150,463,245.84/13,417.74
  6. Step 6: Final answer
    x = 11,213.75

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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.