Home / 20,858.77-28,784.92-11,427.33

Finding the Fourth Proportional to 20,858.77, 28,784.92 and 11,427.33

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Solution

The fourth proportional to 20,858.77, 28,784.92 and 11,427.33 is: 15,769.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,858.77 : 28,784.92 = 11,427.33 : x
  2. Step 2: Convert to fraction form
    20,858.77/28,784.92 = 11,427.33/x
  3. Step 3: Cross multiply
    20,858.77x = 28,784.92 × 11,427.33
  4. Step 4: Simplify right side
    20,858.77x = 328,934,779.86
  5. Step 5: Solve for x
    x = 328,934,779.86/20,858.77
  6. Step 6: Final answer
    x = 15,769.62

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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.