Home / 13,345.63-20,021.28-3,986.38

Finding the Fourth Proportional to 13,345.63, 20,021.28 and 3,986.38

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Solution

The fourth proportional to 13,345.63, 20,021.28 and 3,986.38 is: 5,980.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,345.63 : 20,021.28 = 3,986.38 : x
  2. Step 2: Convert to fraction form
    13,345.63/20,021.28 = 3,986.38/x
  3. Step 3: Cross multiply
    13,345.63x = 20,021.28 × 3,986.38
  4. Step 4: Simplify right side
    13,345.63x = 79,812,330.06
  5. Step 5: Solve for x
    x = 79,812,330.06/13,345.63
  6. Step 6: Final answer
    x = 5,980.41

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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.