Home / 13,558.22-20,335.40-5,242.15

Finding the Fourth Proportional to 13,558.22, 20,335.40 and 5,242.15

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Solution

The fourth proportional to 13,558.22, 20,335.40 and 5,242.15 is: 7,862.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,558.22 : 20,335.40 = 5,242.15 : x
  2. Step 2: Convert to fraction form
    13,558.22/20,335.40 = 5,242.15/x
  3. Step 3: Cross multiply
    13,558.22x = 20,335.40 × 5,242.15
  4. Step 4: Simplify right side
    13,558.22x = 106,601,217.11
  5. Step 5: Solve for x
    x = 106,601,217.11/13,558.22
  6. Step 6: Final answer
    x = 7,862.48

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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.