Home / 12,185.24-18,279.47-3,420.23

Finding the Fourth Proportional to 12,185.24, 18,279.47 and 3,420.23

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Solution

The fourth proportional to 12,185.24, 18,279.47 and 3,420.23 is: 5,130.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,185.24 : 18,279.47 = 3,420.23 : x
  2. Step 2: Convert to fraction form
    12,185.24/18,279.47 = 3,420.23/x
  3. Step 3: Cross multiply
    12,185.24x = 18,279.47 × 3,420.23
  4. Step 4: Simplify right side
    12,185.24x = 62,519,908.83
  5. Step 5: Solve for x
    x = 62,519,908.83/12,185.24
  6. Step 6: Final answer
    x = 5,130.79

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Double scale
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Similar ratio
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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.