Home / 20,919.24-28,861.43-13,369.93

Finding the Fourth Proportional to 20,919.24, 28,861.43 and 13,369.93

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Solution

The fourth proportional to 20,919.24, 28,861.43 and 13,369.93 is: 18,445.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,919.24 : 28,861.43 = 13,369.93 : x
  2. Step 2: Convert to fraction form
    20,919.24/28,861.43 = 13,369.93/x
  3. Step 3: Cross multiply
    20,919.24x = 28,861.43 × 13,369.93
  4. Step 4: Simplify right side
    20,919.24x = 385,875,231.95
  5. Step 5: Solve for x
    x = 385,875,231.95/20,919.24
  6. Step 6: Final answer
    x = 18,445.95

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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.