Home / 12,129.12-18,221.25-10,468.41

Finding the Fourth Proportional to 12,129.12, 18,221.25 and 10,468.41

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Solution

The fourth proportional to 12,129.12, 18,221.25 and 10,468.41 is: 15,726.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,129.12 : 18,221.25 = 10,468.41 : x
  2. Step 2: Convert to fraction form
    12,129.12/18,221.25 = 10,468.41/x
  3. Step 3: Cross multiply
    12,129.12x = 18,221.25 × 10,468.41
  4. Step 4: Simplify right side
    12,129.12x = 190,747,515.71
  5. Step 5: Solve for x
    x = 190,747,515.71/12,129.12
  6. Step 6: Final answer
    x = 15,726.41

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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.