Home / 19,980.55-29,972.31-5,189.54

Finding the Fourth Proportional to 19,980.55, 29,972.31 and 5,189.54

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Solution

The fourth proportional to 19,980.55, 29,972.31 and 5,189.54 is: 7,784.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,980.55 : 29,972.31 = 5,189.54 : x
  2. Step 2: Convert to fraction form
    19,980.55/29,972.31 = 5,189.54/x
  3. Step 3: Cross multiply
    19,980.55x = 29,972.31 × 5,189.54
  4. Step 4: Simplify right side
    19,980.55x = 155,542,576.57
  5. Step 5: Solve for x
    x = 155,542,576.57/19,980.55
  6. Step 6: Final answer
    x = 7,784.70

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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.