Home / 13,912.02-20,870.76-5,147.01

Finding the Fourth Proportional to 13,912.02, 20,870.76 and 5,147.01

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Solution

The fourth proportional to 13,912.02, 20,870.76 and 5,147.01 is: 7,721.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,912.02 : 20,870.76 = 5,147.01 : x
  2. Step 2: Convert to fraction form
    13,912.02/20,870.76 = 5,147.01/x
  3. Step 3: Cross multiply
    13,912.02x = 20,870.76 × 5,147.01
  4. Step 4: Simplify right side
    13,912.02x = 107,422,029.73
  5. Step 5: Solve for x
    x = 107,422,029.73/13,912.02
  6. Step 6: Final answer
    x = 7,721.53

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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.