Home / 20,140.80-30,175.20-9,729.60

Finding the Fourth Proportional to 20,140.80, 30,175.20 and 9,729.60

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Solution

The fourth proportional to 20,140.80, 30,175.20 and 9,729.60 is: 14,577.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,140.80 : 30,175.20 = 9,729.60 : x
  2. Step 2: Convert to fraction form
    20,140.80/30,175.20 = 9,729.60/x
  3. Step 3: Cross multiply
    20,140.80x = 30,175.20 × 9,729.60
  4. Step 4: Simplify right side
    20,140.80x = 293,592,625.92
  5. Step 5: Solve for x
    x = 293,592,625.92/20,140.80
  6. Step 6: Final answer
    x = 14,577.01

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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.