Home / 20,880.27-28,815.35-11,929.23

Finding the Fourth Proportional to 20,880.27, 28,815.35 and 11,929.23

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Solution

The fourth proportional to 20,880.27, 28,815.35 and 11,929.23 is: 16,462.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,880.27 : 28,815.35 = 11,929.23 : x
  2. Step 2: Convert to fraction form
    20,880.27/28,815.35 = 11,929.23/x
  3. Step 3: Cross multiply
    20,880.27x = 28,815.35 × 11,929.23
  4. Step 4: Simplify right side
    20,880.27x = 343,744,878.03
  5. Step 5: Solve for x
    x = 343,744,878.03/20,880.27
  6. Step 6: Final answer
    x = 16,462.66

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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.