Home / 28,686.73-39,565.77-20,755.21

Finding the Fourth Proportional to 28,686.73, 39,565.77 and 20,755.21

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Solution

The fourth proportional to 28,686.73, 39,565.77 and 20,755.21 is: 28,626.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,686.73 : 39,565.77 = 20,755.21 : x
  2. Step 2: Convert to fraction form
    28,686.73/39,565.77 = 20,755.21/x
  3. Step 3: Cross multiply
    28,686.73x = 39,565.77 × 20,755.21
  4. Step 4: Simplify right side
    28,686.73x = 821,195,865.16
  5. Step 5: Solve for x
    x = 821,195,865.16/28,686.73
  6. Step 6: Final answer
    x = 28,626.33

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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.