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Finding the Fourth Proportional to 14,845.20, 20,486.25 and 8,130.69

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Solution

The fourth proportional to 14,845.20, 20,486.25 and 8,130.69 is: 11,220.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,845.20 : 20,486.25 = 8,130.69 : x
  2. Step 2: Convert to fraction form
    14,845.20/20,486.25 = 8,130.69/x
  3. Step 3: Cross multiply
    14,845.20x = 20,486.25 × 8,130.69
  4. Step 4: Simplify right side
    14,845.20x = 166,567,348.01
  5. Step 5: Solve for x
    x = 166,567,348.01/14,845.20
  6. Step 6: Final answer
    x = 11,220.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.