Home / 21,005.29-28,986.24-11,573.65

Finding the Fourth Proportional to 21,005.29, 28,986.24 and 11,573.65

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Solution

The fourth proportional to 21,005.29, 28,986.24 and 11,573.65 is: 15,971.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,005.29 : 28,986.24 = 11,573.65 : x
  2. Step 2: Convert to fraction form
    21,005.29/28,986.24 = 11,573.65/x
  3. Step 3: Cross multiply
    21,005.29x = 28,986.24 × 11,573.65
  4. Step 4: Simplify right side
    21,005.29x = 335,476,596.58
  5. Step 5: Solve for x
    x = 335,476,596.58/21,005.29
  6. Step 6: Final answer
    x = 15,971.05

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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.