Home / 20,437.81-28,204.28-11,940.42

Finding the Fourth Proportional to 20,437.81, 28,204.28 and 11,940.42

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Solution

The fourth proportional to 20,437.81, 28,204.28 and 11,940.42 is: 16,477.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,437.81 : 28,204.28 = 11,940.42 : x
  2. Step 2: Convert to fraction form
    20,437.81/28,204.28 = 11,940.42/x
  3. Step 3: Cross multiply
    20,437.81x = 28,204.28 × 11,940.42
  4. Step 4: Simplify right side
    20,437.81x = 336,770,949.00
  5. Step 5: Solve for x
    x = 336,770,949.00/20,437.81
  6. Step 6: Final answer
    x = 16,477.84

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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.