Home / 31,128.40-46,741.20-18,006.40

Finding the Fourth Proportional to 31,128.40, 46,741.20 and 18,006.40

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Solution

The fourth proportional to 31,128.40, 46,741.20 and 18,006.40 is: 27,037.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,128.40 : 46,741.20 = 18,006.40 : x
  2. Step 2: Convert to fraction form
    31,128.40/46,741.20 = 18,006.40/x
  3. Step 3: Cross multiply
    31,128.40x = 46,741.20 × 18,006.40
  4. Step 4: Simplify right side
    31,128.40x = 841,640,743.68
  5. Step 5: Solve for x
    x = 841,640,743.68/31,128.40
  6. Step 6: Final answer
    x = 27,037.71

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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.