Home / 20,769.72-28,661.85-11,817.03

Finding the Fourth Proportional to 20,769.72, 28,661.85 and 11,817.03

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Solution

The fourth proportional to 20,769.72, 28,661.85 and 11,817.03 is: 16,307.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,769.72 : 28,661.85 = 11,817.03 : x
  2. Step 2: Convert to fraction form
    20,769.72/28,661.85 = 11,817.03/x
  3. Step 3: Cross multiply
    20,769.72x = 28,661.85 × 11,817.03
  4. Step 4: Simplify right side
    20,769.72x = 338,697,941.31
  5. Step 5: Solve for x
    x = 338,697,941.31/20,769.72
  6. Step 6: Final answer
    x = 16,307.29

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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.