Home / 21,009.06-28,992.51-11,448.96

Finding the Fourth Proportional to 21,009.06, 28,992.51 and 11,448.96

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Solution

The fourth proportional to 21,009.06, 28,992.51 and 11,448.96 is: 15,799.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,009.06 : 28,992.51 = 11,448.96 : x
  2. Step 2: Convert to fraction form
    21,009.06/28,992.51 = 11,448.96/x
  3. Step 3: Cross multiply
    21,009.06x = 28,992.51 × 11,448.96
  4. Step 4: Simplify right side
    21,009.06x = 331,933,950.13
  5. Step 5: Solve for x
    x = 331,933,950.13/21,009.06
  6. Step 6: Final answer
    x = 15,799.56

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1.5x scale

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.