Home / 18,216.02-25,139.18-11,143.80

Finding the Fourth Proportional to 18,216.02, 25,139.18 and 11,143.80

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Solution

The fourth proportional to 18,216.02, 25,139.18 and 11,143.80 is: 15,379.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,216.02 : 25,139.18 = 11,143.80 : x
  2. Step 2: Convert to fraction form
    18,216.02/25,139.18 = 11,143.80/x
  3. Step 3: Cross multiply
    18,216.02x = 25,139.18 × 11,143.80
  4. Step 4: Simplify right side
    18,216.02x = 280,146,021.94
  5. Step 5: Solve for x
    x = 280,146,021.94/18,216.02
  6. Step 6: Final answer
    x = 15,379.10

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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.