Home / 39,685.28-54,763.96-21,780.59

Finding the Fourth Proportional to 39,685.28, 54,763.96 and 21,780.59

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Solution

The fourth proportional to 39,685.28, 54,763.96 and 21,780.59 is: 30,056.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,685.28 : 54,763.96 = 21,780.59 : x
  2. Step 2: Convert to fraction form
    39,685.28/54,763.96 = 21,780.59/x
  3. Step 3: Cross multiply
    39,685.28x = 54,763.96 × 21,780.59
  4. Step 4: Simplify right side
    39,685.28x = 1,192,791,359.54
  5. Step 5: Solve for x
    x = 1,192,791,359.54/39,685.28
  6. Step 6: Final answer
    x = 30,056.27

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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.