Home / 20,897.74-28,828.46-12,396.12

Finding the Fourth Proportional to 20,897.74, 28,828.46 and 12,396.12

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Solution

The fourth proportional to 20,897.74, 28,828.46 and 12,396.12 is: 17,100.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,897.74 : 28,828.46 = 12,396.12 : x
  2. Step 2: Convert to fraction form
    20,897.74/28,828.46 = 12,396.12/x
  3. Step 3: Cross multiply
    20,897.74x = 28,828.46 × 12,396.12
  4. Step 4: Simplify right side
    20,897.74x = 357,361,049.58
  5. Step 5: Solve for x
    x = 357,361,049.58/20,897.74
  6. Step 6: Final answer
    x = 17,100.46

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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.