Home / 39,686.16-54,766.85-21,781.21

Finding the Fourth Proportional to 39,686.16, 54,766.85 and 21,781.21

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Solution

The fourth proportional to 39,686.16, 54,766.85 and 21,781.21 is: 30,058.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,686.16 : 54,766.85 = 21,781.21 : x
  2. Step 2: Convert to fraction form
    39,686.16/54,766.85 = 21,781.21/x
  3. Step 3: Cross multiply
    39,686.16x = 54,766.85 × 21,781.21
  4. Step 4: Simplify right side
    39,686.16x = 1,192,888,260.89
  5. Step 5: Solve for x
    x = 1,192,888,260.89/39,686.16
  6. Step 6: Final answer
    x = 30,058.04

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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.