Home / 30,428.48-45,641.73-13,788.56

Finding the Fourth Proportional to 30,428.48, 45,641.73 and 13,788.56

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Solution

The fourth proportional to 30,428.48, 45,641.73 and 13,788.56 is: 20,682.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,428.48 : 45,641.73 = 13,788.56 : x
  2. Step 2: Convert to fraction form
    30,428.48/45,641.73 = 13,788.56/x
  3. Step 3: Cross multiply
    30,428.48x = 45,641.73 × 13,788.56
  4. Step 4: Simplify right side
    30,428.48x = 629,333,732.61
  5. Step 5: Solve for x
    x = 629,333,732.61/30,428.48
  6. Step 6: Final answer
    x = 20,682.39

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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.