Home / 20,713.84-28,570.66-15,661.87

Finding the Fourth Proportional to 20,713.84, 28,570.66 and 15,661.87

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Solution

The fourth proportional to 20,713.84, 28,570.66 and 15,661.87 is: 21,602.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,713.84 : 28,570.66 = 15,661.87 : x
  2. Step 2: Convert to fraction form
    20,713.84/28,570.66 = 15,661.87/x
  3. Step 3: Cross multiply
    20,713.84x = 28,570.66 × 15,661.87
  4. Step 4: Simplify right side
    20,713.84x = 447,469,962.73
  5. Step 5: Solve for x
    x = 447,469,962.73/20,713.84
  6. Step 6: Final answer
    x = 21,602.46

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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.