Home / 20,722.72-28,597.81-12,226.91

Finding the Fourth Proportional to 20,722.72, 28,597.81 and 12,226.91

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Solution

The fourth proportional to 20,722.72, 28,597.81 and 12,226.91 is: 16,873.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,722.72 : 28,597.81 = 12,226.91 : x
  2. Step 2: Convert to fraction form
    20,722.72/28,597.81 = 12,226.91/x
  3. Step 3: Cross multiply
    20,722.72x = 28,597.81 × 12,226.91
  4. Step 4: Simplify right side
    20,722.72x = 349,662,849.07
  5. Step 5: Solve for x
    x = 349,662,849.07/20,722.72
  6. Step 6: Final answer
    x = 16,873.41

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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.