Home / 20,971.50-28,940.87-11,540.27

Finding the Fourth Proportional to 20,971.50, 28,940.87 and 11,540.27

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Solution

The fourth proportional to 20,971.50, 28,940.87 and 11,540.27 is: 15,925.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,971.50 : 28,940.87 = 11,540.27 : x
  2. Step 2: Convert to fraction form
    20,971.50/28,940.87 = 11,540.27/x
  3. Step 3: Cross multiply
    20,971.50x = 28,940.87 × 11,540.27
  4. Step 4: Simplify right side
    20,971.50x = 333,985,337.98
  5. Step 5: Solve for x
    x = 333,985,337.98/20,971.50
  6. Step 6: Final answer
    x = 15,925.68

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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.