Home / 20,880.99-28,816.43-11,450.43

Finding the Fourth Proportional to 20,880.99, 28,816.43 and 11,450.43

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Solution

The fourth proportional to 20,880.99, 28,816.43 and 11,450.43 is: 15,801.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,880.99 : 28,816.43 = 11,450.43 : x
  2. Step 2: Convert to fraction form
    20,880.99/28,816.43 = 11,450.43/x
  3. Step 3: Cross multiply
    20,880.99x = 28,816.43 × 11,450.43
  4. Step 4: Simplify right side
    20,880.99x = 329,960,457.31
  5. Step 5: Solve for x
    x = 329,960,457.31/20,880.99
  6. Step 6: Final answer
    x = 15,801.95

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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.