Home / 20,172.78-30,184.52-12,172.19

Finding the Fourth Proportional to 20,172.78, 30,184.52 and 12,172.19

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Solution

The fourth proportional to 20,172.78, 30,184.52 and 12,172.19 is: 18,213.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,172.78 : 30,184.52 = 12,172.19 : x
  2. Step 2: Convert to fraction form
    20,172.78/30,184.52 = 12,172.19/x
  3. Step 3: Cross multiply
    20,172.78x = 30,184.52 × 12,172.19
  4. Step 4: Simplify right side
    20,172.78x = 367,411,561.58
  5. Step 5: Solve for x
    x = 367,411,561.58/20,172.78
  6. Step 6: Final answer
    x = 18,213.23

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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.