Home / 20,668.47-31,002.71-8,975.31

Finding the Fourth Proportional to 20,668.47, 31,002.71 and 8,975.31

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Solution

The fourth proportional to 20,668.47, 31,002.71 and 8,975.31 is: 13,462.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,668.47 : 31,002.71 = 8,975.31 : x
  2. Step 2: Convert to fraction form
    20,668.47/31,002.71 = 8,975.31/x
  3. Step 3: Cross multiply
    20,668.47x = 31,002.71 × 8,975.31
  4. Step 4: Simplify right side
    20,668.47x = 278,258,888.21
  5. Step 5: Solve for x
    x = 278,258,888.21/20,668.47
  6. Step 6: Final answer
    x = 13,462.97

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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.