Home / 21,749.88-30,016.95-12,191.39

Finding the Fourth Proportional to 21,749.88, 30,016.95 and 12,191.39

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Solution

The fourth proportional to 21,749.88, 30,016.95 and 12,191.39 is: 16,825.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,749.88 : 30,016.95 = 12,191.39 : x
  2. Step 2: Convert to fraction form
    21,749.88/30,016.95 = 12,191.39/x
  3. Step 3: Cross multiply
    21,749.88x = 30,016.95 × 12,191.39
  4. Step 4: Simplify right side
    21,749.88x = 365,948,429.67
  5. Step 5: Solve for x
    x = 365,948,429.67/21,749.88
  6. Step 6: Final answer
    x = 16,825.31

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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.