Home / 12,212.40-18,304.20-9,130.80

Finding the Fourth Proportional to 12,212.40, 18,304.20 and 9,130.80

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Solution

The fourth proportional to 12,212.40, 18,304.20 and 9,130.80 is: 13,685.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,212.40 : 18,304.20 = 9,130.80 : x
  2. Step 2: Convert to fraction form
    12,212.40/18,304.20 = 9,130.80/x
  3. Step 3: Cross multiply
    12,212.40x = 18,304.20 × 9,130.80
  4. Step 4: Simplify right side
    12,212.40x = 167,131,989.36
  5. Step 5: Solve for x
    x = 167,131,989.36/12,212.40
  6. Step 6: Final answer
    x = 13,685.43

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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.