Home / 20,866.08-28,788-11,907.12

Finding the Fourth Proportional to 20,866.08, 28,788 and 11,907.12

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Solution

The fourth proportional to 20,866.08, 28,788 and 11,907.12 is: 16,427.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,866.08 : 28,788 = 11,907.12 : x
  2. Step 2: Convert to fraction form
    20,866.08/28,788 = 11,907.12/x
  3. Step 3: Cross multiply
    20,866.08x = 28,788 × 11,907.12
  4. Step 4: Simplify right side
    20,866.08x = 342,782,170.56
  5. Step 5: Solve for x
    x = 342,782,170.56/20,866.08
  6. Step 6: Final answer
    x = 16,427.72

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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.