Home / 21,005.25-28,987.34-11,573.61

Finding the Fourth Proportional to 21,005.25, 28,987.34 and 11,573.61

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Solution

The fourth proportional to 21,005.25, 28,987.34 and 11,573.61 is: 15,971.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,005.25 : 28,987.34 = 11,573.61 : x
  2. Step 2: Convert to fraction form
    21,005.25/28,987.34 = 11,573.61/x
  3. Step 3: Cross multiply
    21,005.25x = 28,987.34 × 11,573.61
  4. Step 4: Simplify right side
    21,005.25x = 335,488,110.23
  5. Step 5: Solve for x
    x = 335,488,110.23/21,005.25
  6. Step 6: Final answer
    x = 15,971.63

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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.