Home / 21,849.88-30,152.77-12,420.26

Finding the Fourth Proportional to 21,849.88, 30,152.77 and 12,420.26

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Solution

The fourth proportional to 21,849.88, 30,152.77 and 12,420.26 is: 17,139.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,849.88 : 30,152.77 = 12,420.26 : x
  2. Step 2: Convert to fraction form
    21,849.88/30,152.77 = 12,420.26/x
  3. Step 3: Cross multiply
    21,849.88x = 30,152.77 × 12,420.26
  4. Step 4: Simplify right side
    21,849.88x = 374,505,243.12
  5. Step 5: Solve for x
    x = 374,505,243.12/21,849.88
  6. Step 6: Final answer
    x = 17,139.92

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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.