Home / 21,605.20-29,815.15-11,669.20

Finding the Fourth Proportional to 21,605.20, 29,815.15 and 11,669.20

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Solution

The fourth proportional to 21,605.20, 29,815.15 and 11,669.20 is: 16,103.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,605.20 : 29,815.15 = 11,669.20 : x
  2. Step 2: Convert to fraction form
    21,605.20/29,815.15 = 11,669.20/x
  3. Step 3: Cross multiply
    21,605.20x = 29,815.15 × 11,669.20
  4. Step 4: Simplify right side
    21,605.20x = 347,918,948.38
  5. Step 5: Solve for x
    x = 347,918,948.38/21,605.20
  6. Step 6: Final answer
    x = 16,103.48

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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.