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Finding the Fourth Proportional to 13,335.40, 20,005.80 and 4,571.20

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Solution

The fourth proportional to 13,335.40, 20,005.80 and 4,571.20 is: 6,857.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,335.40 : 20,005.80 = 4,571.20 : x
  2. Step 2: Convert to fraction form
    13,335.40/20,005.80 = 4,571.20/x
  3. Step 3: Cross multiply
    13,335.40x = 20,005.80 × 4,571.20
  4. Step 4: Simplify right side
    13,335.40x = 91,450,512.96
  5. Step 5: Solve for x
    x = 91,450,512.96/13,335.40
  6. Step 6: Final answer
    x = 6,857.73

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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.