Home / 13,345.74-20,019.60-3,985.56

Finding the Fourth Proportional to 13,345.74, 20,019.60 and 3,985.56

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Solution

The fourth proportional to 13,345.74, 20,019.60 and 3,985.56 is: 5,978.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,345.74 : 20,019.60 = 3,985.56 : x
  2. Step 2: Convert to fraction form
    13,345.74/20,019.60 = 3,985.56/x
  3. Step 3: Cross multiply
    13,345.74x = 20,019.60 × 3,985.56
  4. Step 4: Simplify right side
    13,345.74x = 79,789,316.98
  5. Step 5: Solve for x
    x = 79,789,316.98/13,345.74
  6. Step 6: Final answer
    x = 5,978.64

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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.