Home / 39,286.81-54,215.52-21,381.81

Finding the Fourth Proportional to 39,286.81, 54,215.52 and 21,381.81

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Solution

The fourth proportional to 39,286.81, 54,215.52 and 21,381.81 is: 29,506.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,286.81 : 54,215.52 = 21,381.81 : x
  2. Step 2: Convert to fraction form
    39,286.81/54,215.52 = 21,381.81/x
  3. Step 3: Cross multiply
    39,286.81x = 54,215.52 × 21,381.81
  4. Step 4: Simplify right side
    39,286.81x = 1,159,225,982.45
  5. Step 5: Solve for x
    x = 1,159,225,982.45/39,286.81
  6. Step 6: Final answer
    x = 29,506.75

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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.