Home / 28,742.90-39,653.94-21,207.32

Finding the Fourth Proportional to 28,742.90, 39,653.94 and 21,207.32

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Solution

The fourth proportional to 28,742.90, 39,653.94 and 21,207.32 is: 29,257.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,742.90 : 39,653.94 = 21,207.32 : x
  2. Step 2: Convert to fraction form
    28,742.90/39,653.94 = 21,207.32/x
  3. Step 3: Cross multiply
    28,742.90x = 39,653.94 × 21,207.32
  4. Step 4: Simplify right side
    28,742.90x = 840,953,596.57
  5. Step 5: Solve for x
    x = 840,953,596.57/28,742.90
  6. Step 6: Final answer
    x = 29,257.79

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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.