Home / 28,080.78-42,121.31-11,440.98

Finding the Fourth Proportional to 28,080.78, 42,121.31 and 11,440.98

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Solution

The fourth proportional to 28,080.78, 42,121.31 and 11,440.98 is: 17,161.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,080.78 : 42,121.31 = 11,440.98 : x
  2. Step 2: Convert to fraction form
    28,080.78/42,121.31 = 11,440.98/x
  3. Step 3: Cross multiply
    28,080.78x = 42,121.31 × 11,440.98
  4. Step 4: Simplify right side
    28,080.78x = 481,909,008.08
  5. Step 5: Solve for x
    x = 481,909,008.08/28,080.78
  6. Step 6: Final answer
    x = 17,161.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.