Home / 39,686.07-54,767.78-21,780.91

Finding the Fourth Proportional to 39,686.07, 54,767.78 and 21,780.91

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Solution

The fourth proportional to 39,686.07, 54,767.78 and 21,780.91 is: 30,058.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,686.07 : 54,767.78 = 21,780.91 : x
  2. Step 2: Convert to fraction form
    39,686.07/54,767.78 = 21,780.91/x
  3. Step 3: Cross multiply
    39,686.07x = 54,767.78 × 21,780.91
  4. Step 4: Simplify right side
    39,686.07x = 1,192,892,087.08
  5. Step 5: Solve for x
    x = 1,192,892,087.08/39,686.07
  6. Step 6: Final answer
    x = 30,058.21

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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.