Home / 28,758.43-39,683.84-21,208.82

Finding the Fourth Proportional to 28,758.43, 39,683.84 and 21,208.82

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Solution

The fourth proportional to 28,758.43, 39,683.84 and 21,208.82 is: 29,266.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,758.43 : 39,683.84 = 21,208.82 : x
  2. Step 2: Convert to fraction form
    28,758.43/39,683.84 = 21,208.82/x
  3. Step 3: Cross multiply
    28,758.43x = 39,683.84 × 21,208.82
  4. Step 4: Simplify right side
    28,758.43x = 841,647,419.47
  5. Step 5: Solve for x
    x = 841,647,419.47/28,758.43
  6. Step 6: Final answer
    x = 29,266.11

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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.