Home / 13,678.95-20,518.43-11,216.55

Finding the Fourth Proportional to 13,678.95, 20,518.43 and 11,216.55

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Solution

The fourth proportional to 13,678.95, 20,518.43 and 11,216.55 is: 16,824.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,678.95 : 20,518.43 = 11,216.55 : x
  2. Step 2: Convert to fraction form
    13,678.95/20,518.43 = 11,216.55/x
  3. Step 3: Cross multiply
    13,678.95x = 20,518.43 × 11,216.55
  4. Step 4: Simplify right side
    13,678.95x = 230,145,939.93
  5. Step 5: Solve for x
    x = 230,145,939.93/13,678.95
  6. Step 6: Final answer
    x = 16,824.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.