Home / 20,443.08-28,212-11,491.40

Finding the Fourth Proportional to 20,443.08, 28,212 and 11,491.40

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Solution

The fourth proportional to 20,443.08, 28,212 and 11,491.40 is: 15,858.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,443.08 : 28,212 = 11,491.40 : x
  2. Step 2: Convert to fraction form
    20,443.08/28,212 = 11,491.40/x
  3. Step 3: Cross multiply
    20,443.08x = 28,212 × 11,491.40
  4. Step 4: Simplify right side
    20,443.08x = 324,195,376.80
  5. Step 5: Solve for x
    x = 324,195,376.80/20,443.08
  6. Step 6: Final answer
    x = 15,858.44

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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.