Home / 13,179.87-18,188.28-7,130.09

Finding the Fourth Proportional to 13,179.87, 18,188.28 and 7,130.09

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Solution

The fourth proportional to 13,179.87, 18,188.28 and 7,130.09 is: 9,839.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,179.87 : 18,188.28 = 7,130.09 : x
  2. Step 2: Convert to fraction form
    13,179.87/18,188.28 = 7,130.09/x
  3. Step 3: Cross multiply
    13,179.87x = 18,188.28 × 7,130.09
  4. Step 4: Simplify right side
    13,179.87x = 129,684,073.35
  5. Step 5: Solve for x
    x = 129,684,073.35/13,179.87
  6. Step 6: Final answer
    x = 9,839.56

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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.