Home / 20,317.88-30,478.80-7,169.60

Finding the Fourth Proportional to 20,317.88, 30,478.80 and 7,169.60

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Solution

The fourth proportional to 20,317.88, 30,478.80 and 7,169.60 is: 10,755.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,317.88 : 30,478.80 = 7,169.60 : x
  2. Step 2: Convert to fraction form
    20,317.88/30,478.80 = 7,169.60/x
  3. Step 3: Cross multiply
    20,317.88x = 30,478.80 × 7,169.60
  4. Step 4: Simplify right side
    20,317.88x = 218,520,804.48
  5. Step 5: Solve for x
    x = 218,520,804.48/20,317.88
  6. Step 6: Final answer
    x = 10,755.10

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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.