Home / 28,454.19-39,270.74-15,879.75

Finding the Fourth Proportional to 28,454.19, 39,270.74 and 15,879.75

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Solution

The fourth proportional to 28,454.19, 39,270.74 and 15,879.75 is: 21,916.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,454.19 : 39,270.74 = 15,879.75 : x
  2. Step 2: Convert to fraction form
    28,454.19/39,270.74 = 15,879.75/x
  3. Step 3: Cross multiply
    28,454.19x = 39,270.74 × 15,879.75
  4. Step 4: Simplify right side
    28,454.19x = 623,609,454.12
  5. Step 5: Solve for x
    x = 623,609,454.12/28,454.19
  6. Step 6: Final answer
    x = 21,916.26

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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.