Home / 30,172.80-45,259.20-20,841.60

Finding the Fourth Proportional to 30,172.80, 45,259.20 and 20,841.60

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Solution

The fourth proportional to 30,172.80, 45,259.20 and 20,841.60 is: 31,262.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,172.80 : 45,259.20 = 20,841.60 : x
  2. Step 2: Convert to fraction form
    30,172.80/45,259.20 = 20,841.60/x
  3. Step 3: Cross multiply
    30,172.80x = 45,259.20 × 20,841.60
  4. Step 4: Simplify right side
    30,172.80x = 943,274,142.72
  5. Step 5: Solve for x
    x = 943,274,142.72/30,172.80
  6. Step 6: Final answer
    x = 31,262.40

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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.