Home / 20,721.94-28,596.50-11,769.66

Finding the Fourth Proportional to 20,721.94, 28,596.50 and 11,769.66

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Solution

The fourth proportional to 20,721.94, 28,596.50 and 11,769.66 is: 16,242.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,721.94 : 28,596.50 = 11,769.66 : x
  2. Step 2: Convert to fraction form
    20,721.94/28,596.50 = 11,769.66/x
  3. Step 3: Cross multiply
    20,721.94x = 28,596.50 × 11,769.66
  4. Step 4: Simplify right side
    20,721.94x = 336,571,082.19
  5. Step 5: Solve for x
    x = 336,571,082.19/20,721.94
  6. Step 6: Final answer
    x = 16,242.26

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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.