Home / 21,172.74-29,205.15-13,628.88

Finding the Fourth Proportional to 21,172.74, 29,205.15 and 13,628.88

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Solution

The fourth proportional to 21,172.74, 29,205.15 and 13,628.88 is: 18,799.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,172.74 : 29,205.15 = 13,628.88 : x
  2. Step 2: Convert to fraction form
    21,172.74/29,205.15 = 13,628.88/x
  3. Step 3: Cross multiply
    21,172.74x = 29,205.15 × 13,628.88
  4. Step 4: Simplify right side
    21,172.74x = 398,033,484.73
  5. Step 5: Solve for x
    x = 398,033,484.73/21,172.74
  6. Step 6: Final answer
    x = 18,799.34

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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.