Home / 21,181.50-29,230.47-11,751.89

Finding the Fourth Proportional to 21,181.50, 29,230.47 and 11,751.89

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Solution

The fourth proportional to 21,181.50, 29,230.47 and 11,751.89 is: 16,217.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,181.50 : 29,230.47 = 11,751.89 : x
  2. Step 2: Convert to fraction form
    21,181.50/29,230.47 = 11,751.89/x
  3. Step 3: Cross multiply
    21,181.50x = 29,230.47 × 11,751.89
  4. Step 4: Simplify right side
    21,181.50x = 343,513,121.94
  5. Step 5: Solve for x
    x = 343,513,121.94/21,181.50
  6. Step 6: Final answer
    x = 16,217.60

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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.