Home / 28,362.88-39,138.42-15,788.44

Finding the Fourth Proportional to 28,362.88, 39,138.42 and 15,788.44

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Solution

The fourth proportional to 28,362.88, 39,138.42 and 15,788.44 is: 21,786.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,362.88 : 39,138.42 = 15,788.44 : x
  2. Step 2: Convert to fraction form
    28,362.88/39,138.42 = 15,788.44/x
  3. Step 3: Cross multiply
    28,362.88x = 39,138.42 × 15,788.44
  4. Step 4: Simplify right side
    28,362.88x = 617,934,595.86
  5. Step 5: Solve for x
    x = 617,934,595.86/28,362.88
  6. Step 6: Final answer
    x = 21,786.74

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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.