Home / 21,131.57-29,183.36-18,285.29

Finding the Fourth Proportional to 21,131.57, 29,183.36 and 18,285.29

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Solution

The fourth proportional to 21,131.57, 29,183.36 and 18,285.29 is: 25,252.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,131.57 : 29,183.36 = 18,285.29 : x
  2. Step 2: Convert to fraction form
    21,131.57/29,183.36 = 18,285.29/x
  3. Step 3: Cross multiply
    21,131.57x = 29,183.36 × 18,285.29
  4. Step 4: Simplify right side
    21,131.57x = 533,626,100.57
  5. Step 5: Solve for x
    x = 533,626,100.57/21,131.57
  6. Step 6: Final answer
    x = 25,252.55

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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.