Home / 28,040-38,695.76-18,121.28

Finding the Fourth Proportional to 28,040, 38,695.76 and 18,121.28

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Solution

The fourth proportional to 28,040, 38,695.76 and 18,121.28 is: 25,007.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,040 : 38,695.76 = 18,121.28 : x
  2. Step 2: Convert to fraction form
    28,040/38,695.76 = 18,121.28/x
  3. Step 3: Cross multiply
    28,040x = 38,695.76 × 18,121.28
  4. Step 4: Simplify right side
    28,040x = 701,216,701.77
  5. Step 5: Solve for x
    x = 701,216,701.77/28,040
  6. Step 6: Final answer
    x = 25,007.73

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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.