Home / 20,980.50-31,483.11-9,293.82

Finding the Fourth Proportional to 20,980.50, 31,483.11 and 9,293.82

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Solution

The fourth proportional to 20,980.50, 31,483.11 and 9,293.82 is: 13,946.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,980.50 : 31,483.11 = 9,293.82 : x
  2. Step 2: Convert to fraction form
    20,980.50/31,483.11 = 9,293.82/x
  3. Step 3: Cross multiply
    20,980.50x = 31,483.11 × 9,293.82
  4. Step 4: Simplify right side
    20,980.50x = 292,598,357.38
  5. Step 5: Solve for x
    x = 292,598,357.38/20,980.50
  6. Step 6: Final answer
    x = 13,946.21

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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.