Home / 12,145.40-18,218.58-3,381.08

Finding the Fourth Proportional to 12,145.40, 18,218.58 and 3,381.08

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Solution

The fourth proportional to 12,145.40, 18,218.58 and 3,381.08 is: 5,071.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,145.40 : 18,218.58 = 3,381.08 : x
  2. Step 2: Convert to fraction form
    12,145.40/18,218.58 = 3,381.08/x
  3. Step 3: Cross multiply
    12,145.40x = 18,218.58 × 3,381.08
  4. Step 4: Simplify right side
    12,145.40x = 61,598,422.47
  5. Step 5: Solve for x
    x = 61,598,422.47/12,145.40
  6. Step 6: Final answer
    x = 5,071.75

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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.