Home / 20,993.28-31,504.48-13,579.28

Finding the Fourth Proportional to 20,993.28, 31,504.48 and 13,579.28

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Solution

The fourth proportional to 20,993.28, 31,504.48 and 13,579.28 is: 20,378.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,993.28 : 31,504.48 = 13,579.28 : x
  2. Step 2: Convert to fraction form
    20,993.28/31,504.48 = 13,579.28/x
  3. Step 3: Cross multiply
    20,993.28x = 31,504.48 × 13,579.28
  4. Step 4: Simplify right side
    20,993.28x = 427,808,155.17
  5. Step 5: Solve for x
    x = 427,808,155.17/20,993.28
  6. Step 6: Final answer
    x = 20,378.34

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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.