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Finding the Fourth Proportional to 20,937.87, 28,893.92 and 11,506.23

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Solution

The fourth proportional to 20,937.87, 28,893.92 and 11,506.23 is: 15,878.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,937.87 : 28,893.92 = 11,506.23 : x
  2. Step 2: Convert to fraction form
    20,937.87/28,893.92 = 11,506.23/x
  3. Step 3: Cross multiply
    20,937.87x = 28,893.92 × 11,506.23
  4. Step 4: Simplify right side
    20,937.87x = 332,460,089.12
  5. Step 5: Solve for x
    x = 332,460,089.12/20,937.87
  6. Step 6: Final answer
    x = 15,878.41

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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.