Home / 12,185.76-18,279.66-3,420.66

Finding the Fourth Proportional to 12,185.76, 18,279.66 and 3,420.66

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Solution

The fourth proportional to 12,185.76, 18,279.66 and 3,420.66 is: 5,131.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,185.76 : 18,279.66 = 3,420.66 : x
  2. Step 2: Convert to fraction form
    12,185.76/18,279.66 = 3,420.66/x
  3. Step 3: Cross multiply
    12,185.76x = 18,279.66 × 3,420.66
  4. Step 4: Simplify right side
    12,185.76x = 62,528,501.78
  5. Step 5: Solve for x
    x = 62,528,501.78/12,185.76
  6. Step 6: Final answer
    x = 5,131.28

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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.