Home / 13,139.49-18,132.38-7,170.96

Finding the Fourth Proportional to 13,139.49, 18,132.38 and 7,170.96

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Solution

The fourth proportional to 13,139.49, 18,132.38 and 7,170.96 is: 9,895.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,139.49 : 18,132.38 = 7,170.96 : x
  2. Step 2: Convert to fraction form
    13,139.49/18,132.38 = 7,170.96/x
  3. Step 3: Cross multiply
    13,139.49x = 18,132.38 × 7,170.96
  4. Step 4: Simplify right side
    13,139.49x = 130,026,571.68
  5. Step 5: Solve for x
    x = 130,026,571.68/13,139.49
  6. Step 6: Final answer
    x = 9,895.86

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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.