Home / 20,789.08-28,725.62-15,403.79

Finding the Fourth Proportional to 20,789.08, 28,725.62 and 15,403.79

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Solution

The fourth proportional to 20,789.08, 28,725.62 and 15,403.79 is: 21,284.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,789.08 : 28,725.62 = 15,403.79 : x
  2. Step 2: Convert to fraction form
    20,789.08/28,725.62 = 15,403.79/x
  3. Step 3: Cross multiply
    20,789.08x = 28,725.62 × 15,403.79
  4. Step 4: Simplify right side
    20,789.08x = 442,483,412.89
  5. Step 5: Solve for x
    x = 442,483,412.89/20,789.08
  6. Step 6: Final answer
    x = 21,284.42

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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.