Home / 20,993.64-31,412.70-15,451.08

Finding the Fourth Proportional to 20,993.64, 31,412.70 and 15,451.08

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Solution

The fourth proportional to 20,993.64, 31,412.70 and 15,451.08 is: 23,119.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,993.64 : 31,412.70 = 15,451.08 : x
  2. Step 2: Convert to fraction form
    20,993.64/31,412.70 = 15,451.08/x
  3. Step 3: Cross multiply
    20,993.64x = 31,412.70 × 15,451.08
  4. Step 4: Simplify right side
    20,993.64x = 485,360,140.72
  5. Step 5: Solve for x
    x = 485,360,140.72/20,993.64
  6. Step 6: Final answer
    x = 23,119.39

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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.