Home / 19,128.98-28,691.85-6,645.80

Finding the Fourth Proportional to 19,128.98, 28,691.85 and 6,645.80

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Solution

The fourth proportional to 19,128.98, 28,691.85 and 6,645.80 is: 9,968.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,128.98 : 28,691.85 = 6,645.80 : x
  2. Step 2: Convert to fraction form
    19,128.98/28,691.85 = 6,645.80/x
  3. Step 3: Cross multiply
    19,128.98x = 28,691.85 × 6,645.80
  4. Step 4: Simplify right side
    19,128.98x = 190,680,296.73
  5. Step 5: Solve for x
    x = 190,680,296.73/19,128.98
  6. Step 6: Final answer
    x = 9,968.14

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.