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Finding the Fourth Proportional to 13,362.92, 20,038.90 and 3,999.64

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Solution

The fourth proportional to 13,362.92, 20,038.90 and 3,999.64 is: 5,997.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,362.92 : 20,038.90 = 3,999.64 : x
  2. Step 2: Convert to fraction form
    13,362.92/20,038.90 = 3,999.64/x
  3. Step 3: Cross multiply
    13,362.92x = 20,038.90 × 3,999.64
  4. Step 4: Simplify right side
    13,362.92x = 80,148,386.00
  5. Step 5: Solve for x
    x = 80,148,386.00/13,362.92
  6. Step 6: Final answer
    x = 5,997.82

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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.