Home / 21,990.51-30,346.38-11,918.52

Finding the Fourth Proportional to 21,990.51, 30,346.38 and 11,918.52

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Solution

The fourth proportional to 21,990.51, 30,346.38 and 11,918.52 is: 16,447.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,990.51 : 30,346.38 = 11,918.52 : x
  2. Step 2: Convert to fraction form
    21,990.51/30,346.38 = 11,918.52/x
  3. Step 3: Cross multiply
    21,990.51x = 30,346.38 × 11,918.52
  4. Step 4: Simplify right side
    21,990.51x = 361,683,936.96
  5. Step 5: Solve for x
    x = 361,683,936.96/21,990.51
  6. Step 6: Final answer
    x = 16,447.27

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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.