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Finding the Fourth Proportional to 18,775.80, 25,879.50 and 13,462.20

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Solution

The fourth proportional to 18,775.80, 25,879.50 and 13,462.20 is: 18,555.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,775.80 : 25,879.50 = 13,462.20 : x
  2. Step 2: Convert to fraction form
    18,775.80/25,879.50 = 13,462.20/x
  3. Step 3: Cross multiply
    18,775.80x = 25,879.50 × 13,462.20
  4. Step 4: Simplify right side
    18,775.80x = 348,395,004.90
  5. Step 5: Solve for x
    x = 348,395,004.90/18,775.80
  6. Step 6: Final answer
    x = 18,555.53

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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.