Home / 12,231.40-18,347.10-10,155.55

Finding the Fourth Proportional to 12,231.40, 18,347.10 and 10,155.55

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Solution

The fourth proportional to 12,231.40, 18,347.10 and 10,155.55 is: 15,233.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,231.40 : 18,347.10 = 10,155.55 : x
  2. Step 2: Convert to fraction form
    12,231.40/18,347.10 = 10,155.55/x
  3. Step 3: Cross multiply
    12,231.40x = 18,347.10 × 10,155.55
  4. Step 4: Simplify right side
    12,231.40x = 186,324,891.41
  5. Step 5: Solve for x
    x = 186,324,891.41/12,231.40
  6. Step 6: Final answer
    x = 15,233.33

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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.