Home / 30,198.16-45,279.96-12,653.20

Finding the Fourth Proportional to 30,198.16, 45,279.96 and 12,653.20

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Solution

The fourth proportional to 30,198.16, 45,279.96 and 12,653.20 is: 18,972.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,198.16 : 45,279.96 = 12,653.20 : x
  2. Step 2: Convert to fraction form
    30,198.16/45,279.96 = 12,653.20/x
  3. Step 3: Cross multiply
    30,198.16x = 45,279.96 × 12,653.20
  4. Step 4: Simplify right side
    30,198.16x = 572,936,389.87
  5. Step 5: Solve for x
    x = 572,936,389.87/30,198.16
  6. Step 6: Final answer
    x = 18,972.56

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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.