Home / 20,943.88-28,902.48-11,991.22

Finding the Fourth Proportional to 20,943.88, 28,902.48 and 11,991.22

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Solution

The fourth proportional to 20,943.88, 28,902.48 and 11,991.22 is: 16,547.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,943.88 : 28,902.48 = 11,991.22 : x
  2. Step 2: Convert to fraction form
    20,943.88/28,902.48 = 11,991.22/x
  3. Step 3: Cross multiply
    20,943.88x = 28,902.48 × 11,991.22
  4. Step 4: Simplify right side
    20,943.88x = 346,575,996.23
  5. Step 5: Solve for x
    x = 346,575,996.23/20,943.88
  6. Step 6: Final answer
    x = 16,547.84

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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.