Home / 13,640.38-18,821.37-7,671.58

Finding the Fourth Proportional to 13,640.38, 18,821.37 and 7,671.58

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Solution

The fourth proportional to 13,640.38, 18,821.37 and 7,671.58 is: 10,585.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,640.38 : 18,821.37 = 7,671.58 : x
  2. Step 2: Convert to fraction form
    13,640.38/18,821.37 = 7,671.58/x
  3. Step 3: Cross multiply
    13,640.38x = 18,821.37 × 7,671.58
  4. Step 4: Simplify right side
    13,640.38x = 144,389,645.66
  5. Step 5: Solve for x
    x = 144,389,645.66/13,640.38
  6. Step 6: Final answer
    x = 10,585.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.