Home / 20,865.80-28,779.54-15,202.28

Finding the Fourth Proportional to 20,865.80, 28,779.54 and 15,202.28

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Solution

The fourth proportional to 20,865.80, 28,779.54 and 15,202.28 is: 20,968.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,865.80 : 28,779.54 = 15,202.28 : x
  2. Step 2: Convert to fraction form
    20,865.80/28,779.54 = 15,202.28/x
  3. Step 3: Cross multiply
    20,865.80x = 28,779.54 × 15,202.28
  4. Step 4: Simplify right side
    20,865.80x = 437,514,481.45
  5. Step 5: Solve for x
    x = 437,514,481.45/20,865.80
  6. Step 6: Final answer
    x = 20,968.02

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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.