Home / 21,147.29-29,183.50-11,587.20

Finding the Fourth Proportional to 21,147.29, 29,183.50 and 11,587.20

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Solution

The fourth proportional to 21,147.29, 29,183.50 and 11,587.20 is: 15,990.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,147.29 : 29,183.50 = 11,587.20 : x
  2. Step 2: Convert to fraction form
    21,147.29/29,183.50 = 11,587.20/x
  3. Step 3: Cross multiply
    21,147.29x = 29,183.50 × 11,587.20
  4. Step 4: Simplify right side
    21,147.29x = 338,155,051.20
  5. Step 5: Solve for x
    x = 338,155,051.20/21,147.29
  6. Step 6: Final answer
    x = 15,990.47

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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.