Home / 13,755.20-20,634.16-4,990.79

Finding the Fourth Proportional to 13,755.20, 20,634.16 and 4,990.79

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Solution

The fourth proportional to 13,755.20, 20,634.16 and 4,990.79 is: 7,486.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,755.20 : 20,634.16 = 4,990.79 : x
  2. Step 2: Convert to fraction form
    13,755.20/20,634.16 = 4,990.79/x
  3. Step 3: Cross multiply
    13,755.20x = 20,634.16 × 4,990.79
  4. Step 4: Simplify right side
    13,755.20x = 102,980,798.49
  5. Step 5: Solve for x
    x = 102,980,798.49/13,755.20
  6. Step 6: Final answer
    x = 7,486.68

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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.