Home / 21,010.65-28,994.45-11,579.01

Finding the Fourth Proportional to 21,010.65, 28,994.45 and 11,579.01

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Solution

The fourth proportional to 21,010.65, 28,994.45 and 11,579.01 is: 15,978.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,010.65 : 28,994.45 = 11,579.01 : x
  2. Step 2: Convert to fraction form
    21,010.65/28,994.45 = 11,579.01/x
  3. Step 3: Cross multiply
    21,010.65x = 28,994.45 × 11,579.01
  4. Step 4: Simplify right side
    21,010.65x = 335,726,968.60
  5. Step 5: Solve for x
    x = 335,726,968.60/21,010.65
  6. Step 6: Final answer
    x = 15,978.89

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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.