Home / 13,345.56-20,021.85-3,985.20

Finding the Fourth Proportional to 13,345.56, 20,021.85 and 3,985.20

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Solution

The fourth proportional to 13,345.56, 20,021.85 and 3,985.20 is: 5,978.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,345.56 : 20,021.85 = 3,985.20 : x
  2. Step 2: Convert to fraction form
    13,345.56/20,021.85 = 3,985.20/x
  3. Step 3: Cross multiply
    13,345.56x = 20,021.85 × 3,985.20
  4. Step 4: Simplify right side
    13,345.56x = 79,791,076.62
  5. Step 5: Solve for x
    x = 79,791,076.62/13,345.56
  6. Step 6: Final answer
    x = 5,978.85

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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.