Home / 20,722.66-28,596.50-12,669.80

Finding the Fourth Proportional to 20,722.66, 28,596.50 and 12,669.80

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Solution

The fourth proportional to 20,722.66, 28,596.50 and 12,669.80 is: 17,483.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,722.66 : 28,596.50 = 12,669.80 : x
  2. Step 2: Convert to fraction form
    20,722.66/28,596.50 = 12,669.80/x
  3. Step 3: Cross multiply
    20,722.66x = 28,596.50 × 12,669.80
  4. Step 4: Simplify right side
    20,722.66x = 362,311,943.84
  5. Step 5: Solve for x
    x = 362,311,943.84/20,722.66
  6. Step 6: Final answer
    x = 17,483.86

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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.