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Finding the Fourth Proportional to 13,572.76, 20,390.34 and 9,579.34

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Solution

The fourth proportional to 13,572.76, 20,390.34 and 9,579.34 is: 14,391.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,572.76 : 20,390.34 = 9,579.34 : x
  2. Step 2: Convert to fraction form
    13,572.76/20,390.34 = 9,579.34/x
  3. Step 3: Cross multiply
    13,572.76x = 20,390.34 × 9,579.34
  4. Step 4: Simplify right side
    13,572.76x = 195,325,999.58
  5. Step 5: Solve for x
    x = 195,325,999.58/13,572.76
  6. Step 6: Final answer
    x = 14,391.03

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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.