Home / 13,305.59-18,359.70-7,640.58

Finding the Fourth Proportional to 13,305.59, 18,359.70 and 7,640.58

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Solution

The fourth proportional to 13,305.59, 18,359.70 and 7,640.58 is: 10,542.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,305.59 : 18,359.70 = 7,640.58 : x
  2. Step 2: Convert to fraction form
    13,305.59/18,359.70 = 7,640.58/x
  3. Step 3: Cross multiply
    13,305.59x = 18,359.70 × 7,640.58
  4. Step 4: Simplify right side
    13,305.59x = 140,278,756.63
  5. Step 5: Solve for x
    x = 140,278,756.63/13,305.59
  6. Step 6: Final answer
    x = 10,542.85

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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.