Home / 21,820.54-30,121.11-14,273.56

Finding the Fourth Proportional to 21,820.54, 30,121.11 and 14,273.56

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Solution

The fourth proportional to 21,820.54, 30,121.11 and 14,273.56 is: 19,703.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,820.54 : 30,121.11 = 14,273.56 : x
  2. Step 2: Convert to fraction form
    21,820.54/30,121.11 = 14,273.56/x
  3. Step 3: Cross multiply
    21,820.54x = 30,121.11 × 14,273.56
  4. Step 4: Simplify right side
    21,820.54x = 429,935,470.85
  5. Step 5: Solve for x
    x = 429,935,470.85/21,820.54
  6. Step 6: Final answer
    x = 19,703.25

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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.