Home / 21,768.36-30,113.82-20,981.04

Finding the Fourth Proportional to 21,768.36, 30,113.82 and 20,981.04

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Solution

The fourth proportional to 21,768.36, 30,113.82 and 20,981.04 is: 29,024.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,768.36 : 30,113.82 = 20,981.04 : x
  2. Step 2: Convert to fraction form
    21,768.36/30,113.82 = 20,981.04/x
  3. Step 3: Cross multiply
    21,768.36x = 30,113.82 × 20,981.04
  4. Step 4: Simplify right side
    21,768.36x = 631,819,261.97
  5. Step 5: Solve for x
    x = 631,819,261.97/21,768.36
  6. Step 6: Final answer
    x = 29,024.66

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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.