Home / 13,579.18-20,342.50-7,638.02

Finding the Fourth Proportional to 13,579.18, 20,342.50 and 7,638.02

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Solution

The fourth proportional to 13,579.18, 20,342.50 and 7,638.02 is: 11,442.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,579.18 : 20,342.50 = 7,638.02 : x
  2. Step 2: Convert to fraction form
    13,579.18/20,342.50 = 7,638.02/x
  3. Step 3: Cross multiply
    13,579.18x = 20,342.50 × 7,638.02
  4. Step 4: Simplify right side
    13,579.18x = 155,376,383.66
  5. Step 5: Solve for x
    x = 155,376,383.66/13,579.18
  6. Step 6: Final answer
    x = 11,442.25

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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.