Home / 20,992.68-28,970.26-11,561.16

Finding the Fourth Proportional to 20,992.68, 28,970.26 and 11,561.16

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Solution

The fourth proportional to 20,992.68, 28,970.26 and 11,561.16 is: 15,954.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,992.68 : 28,970.26 = 11,561.16 : x
  2. Step 2: Convert to fraction form
    20,992.68/28,970.26 = 11,561.16/x
  3. Step 3: Cross multiply
    20,992.68x = 28,970.26 × 11,561.16
  4. Step 4: Simplify right side
    20,992.68x = 334,929,811.10
  5. Step 5: Solve for x
    x = 334,929,811.10/20,992.68
  6. Step 6: Final answer
    x = 15,954.60

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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.