Home / 28,385.56-39,175.16-15,640.06

Finding the Fourth Proportional to 28,385.56, 39,175.16 and 15,640.06

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Solution

The fourth proportional to 28,385.56, 39,175.16 and 15,640.06 is: 21,584.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,385.56 : 39,175.16 = 15,640.06 : x
  2. Step 2: Convert to fraction form
    28,385.56/39,175.16 = 15,640.06/x
  3. Step 3: Cross multiply
    28,385.56x = 39,175.16 × 15,640.06
  4. Step 4: Simplify right side
    28,385.56x = 612,701,578.83
  5. Step 5: Solve for x
    x = 612,701,578.83/28,385.56
  6. Step 6: Final answer
    x = 21,584.97

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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.