Home / 28,454.22-39,268.53-15,879.78

Finding the Fourth Proportional to 28,454.22, 39,268.53 and 15,879.78

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Solution

The fourth proportional to 28,454.22, 39,268.53 and 15,879.78 is: 21,915.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,454.22 : 39,268.53 = 15,879.78 : x
  2. Step 2: Convert to fraction form
    28,454.22/39,268.53 = 15,879.78/x
  3. Step 3: Cross multiply
    28,454.22x = 39,268.53 × 15,879.78
  4. Step 4: Simplify right side
    28,454.22x = 623,575,617.32
  5. Step 5: Solve for x
    x = 623,575,617.32/28,454.22
  6. Step 6: Final answer
    x = 21,915.05

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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.