Home / 39,687.28-54,767.56-21,782.16

Finding the Fourth Proportional to 39,687.28, 54,767.56 and 21,782.16

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Solution

The fourth proportional to 39,687.28, 54,767.56 and 21,782.16 is: 30,058.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,687.28 : 54,767.56 = 21,782.16 : x
  2. Step 2: Convert to fraction form
    39,687.28/54,767.56 = 21,782.16/x
  3. Step 3: Cross multiply
    39,687.28x = 54,767.56 × 21,782.16
  4. Step 4: Simplify right side
    39,687.28x = 1,192,955,754.73
  5. Step 5: Solve for x
    x = 1,192,955,754.73/39,687.28
  6. Step 6: Final answer
    x = 30,058.89

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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.