Home / 28,454.88-39,263.04-15,879.60

Finding the Fourth Proportional to 28,454.88, 39,263.04 and 15,879.60

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Solution

The fourth proportional to 28,454.88, 39,263.04 and 15,879.60 is: 21,911.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,454.88 : 39,263.04 = 15,879.60 : x
  2. Step 2: Convert to fraction form
    28,454.88/39,263.04 = 15,879.60/x
  3. Step 3: Cross multiply
    28,454.88x = 39,263.04 × 15,879.60
  4. Step 4: Simplify right side
    28,454.88x = 623,481,369.98
  5. Step 5: Solve for x
    x = 623,481,369.98/28,454.88
  6. Step 6: Final answer
    x = 21,911.23

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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.