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Finding the Fourth Proportional to 28,992.40, 43,391.40 and 25,493.20

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Solution

The fourth proportional to 28,992.40, 43,391.40 and 25,493.20 is: 38,154.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,992.40 : 43,391.40 = 25,493.20 : x
  2. Step 2: Convert to fraction form
    28,992.40/43,391.40 = 25,493.20/x
  3. Step 3: Cross multiply
    28,992.40x = 43,391.40 × 25,493.20
  4. Step 4: Simplify right side
    28,992.40x = 1,106,185,638.48
  5. Step 5: Solve for x
    x = 1,106,185,638.48/28,992.40
  6. Step 6: Final answer
    x = 38,154.33

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.