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Finding the Fourth Proportional to 13,579.54, 20,376.99 and 7,339.54

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Solution

The fourth proportional to 13,579.54, 20,376.99 and 7,339.54 is: 11,013.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,579.54 : 20,376.99 = 7,339.54 : x
  2. Step 2: Convert to fraction form
    13,579.54/20,376.99 = 7,339.54/x
  3. Step 3: Cross multiply
    13,579.54x = 20,376.99 × 7,339.54
  4. Step 4: Simplify right side
    13,579.54x = 149,557,733.18
  5. Step 5: Solve for x
    x = 149,557,733.18/13,579.54
  6. Step 6: Final answer
    x = 11,013.46

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1.5x scale

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.