Home / 18,747.74-28,120.91-4,707.88

Finding the Fourth Proportional to 18,747.74, 28,120.91 and 4,707.88

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Solution

The fourth proportional to 18,747.74, 28,120.91 and 4,707.88 is: 7,061.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,747.74 : 28,120.91 = 4,707.88 : x
  2. Step 2: Convert to fraction form
    18,747.74/28,120.91 = 4,707.88/x
  3. Step 3: Cross multiply
    18,747.74x = 28,120.91 × 4,707.88
  4. Step 4: Simplify right side
    18,747.74x = 132,389,775.93
  5. Step 5: Solve for x
    x = 132,389,775.93/18,747.74
  6. Step 6: Final answer
    x = 7,061.64

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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.