Home / 18,138.12-25,010.28-11,415.50

Finding the Fourth Proportional to 18,138.12, 25,010.28 and 11,415.50

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Solution

The fourth proportional to 18,138.12, 25,010.28 and 11,415.50 is: 15,740.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,138.12 : 25,010.28 = 11,415.50 : x
  2. Step 2: Convert to fraction form
    18,138.12/25,010.28 = 11,415.50/x
  3. Step 3: Cross multiply
    18,138.12x = 25,010.28 × 11,415.50
  4. Step 4: Simplify right side
    18,138.12x = 285,504,851.34
  5. Step 5: Solve for x
    x = 285,504,851.34/18,138.12
  6. Step 6: Final answer
    x = 15,740.60

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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.