Home / 14,080.80-21,121.20-9,415.20

Finding the Fourth Proportional to 14,080.80, 21,121.20 and 9,415.20

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Solution

The fourth proportional to 14,080.80, 21,121.20 and 9,415.20 is: 14,122.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,080.80 : 21,121.20 = 9,415.20 : x
  2. Step 2: Convert to fraction form
    14,080.80/21,121.20 = 9,415.20/x
  3. Step 3: Cross multiply
    14,080.80x = 21,121.20 × 9,415.20
  4. Step 4: Simplify right side
    14,080.80x = 198,860,322.24
  5. Step 5: Solve for x
    x = 198,860,322.24/14,080.80
  6. Step 6: Final answer
    x = 14,122.80

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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.