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Finding the Fourth Proportional to 13,508.80, 20,223.60 and 9,620.80

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Solution

The fourth proportional to 13,508.80, 20,223.60 and 9,620.80 is: 14,403.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,508.80 : 20,223.60 = 9,620.80 : x
  2. Step 2: Convert to fraction form
    13,508.80/20,223.60 = 9,620.80/x
  3. Step 3: Cross multiply
    13,508.80x = 20,223.60 × 9,620.80
  4. Step 4: Simplify right side
    13,508.80x = 194,567,210.88
  5. Step 5: Solve for x
    x = 194,567,210.88/13,508.80
  6. Step 6: Final answer
    x = 14,403.00

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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.