Home / 21,972.09-30,323.66-12,542.07

Finding the Fourth Proportional to 21,972.09, 30,323.66 and 12,542.07

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Solution

The fourth proportional to 21,972.09, 30,323.66 and 12,542.07 is: 17,309.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,972.09 : 30,323.66 = 12,542.07 : x
  2. Step 2: Convert to fraction form
    21,972.09/30,323.66 = 12,542.07/x
  3. Step 3: Cross multiply
    21,972.09x = 30,323.66 × 12,542.07
  4. Step 4: Simplify right side
    21,972.09x = 380,321,403.67
  5. Step 5: Solve for x
    x = 380,321,403.67/21,972.09
  6. Step 6: Final answer
    x = 17,309.30

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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.