Home / 20,994.88-28,971.86-11,561.62

Finding the Fourth Proportional to 20,994.88, 28,971.86 and 11,561.62

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Solution

The fourth proportional to 20,994.88, 28,971.86 and 11,561.62 is: 15,954.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,994.88 : 28,971.86 = 11,561.62 : x
  2. Step 2: Convert to fraction form
    20,994.88/28,971.86 = 11,561.62/x
  3. Step 3: Cross multiply
    20,994.88x = 28,971.86 × 11,561.62
  4. Step 4: Simplify right side
    20,994.88x = 334,961,636.01
  5. Step 5: Solve for x
    x = 334,961,636.01/20,994.88
  6. Step 6: Final answer
    x = 15,954.44

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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.