Home / 39,396.81-54,367.49-21,491.69

Finding the Fourth Proportional to 39,396.81, 54,367.49 and 21,491.69

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Solution

The fourth proportional to 39,396.81, 54,367.49 and 21,491.69 is: 29,658.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,396.81 : 54,367.49 = 21,491.69 : x
  2. Step 2: Convert to fraction form
    39,396.81/54,367.49 = 21,491.69/x
  3. Step 3: Cross multiply
    39,396.81x = 54,367.49 × 21,491.69
  4. Step 4: Simplify right side
    39,396.81x = 1,168,449,133.70
  5. Step 5: Solve for x
    x = 1,168,449,133.70/39,396.81
  6. Step 6: Final answer
    x = 29,658.47

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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.