Home / 31,126.62-46,689.88-12,419.79

Finding the Fourth Proportional to 31,126.62, 46,689.88 and 12,419.79

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Solution

The fourth proportional to 31,126.62, 46,689.88 and 12,419.79 is: 18,629.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,126.62 : 46,689.88 = 12,419.79 : x
  2. Step 2: Convert to fraction form
    31,126.62/46,689.88 = 12,419.79/x
  3. Step 3: Cross multiply
    31,126.62x = 46,689.88 × 12,419.79
  4. Step 4: Simplify right side
    31,126.62x = 579,878,473.68
  5. Step 5: Solve for x
    x = 579,878,473.68/31,126.62
  6. Step 6: Final answer
    x = 18,629.66

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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.