Home / 12,419.70-18,629.55-9,114.90

Finding the Fourth Proportional to 12,419.70, 18,629.55 and 9,114.90

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Solution

The fourth proportional to 12,419.70, 18,629.55 and 9,114.90 is: 13,672.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,419.70 : 18,629.55 = 9,114.90 : x
  2. Step 2: Convert to fraction form
    12,419.70/18,629.55 = 9,114.90/x
  3. Step 3: Cross multiply
    12,419.70x = 18,629.55 × 9,114.90
  4. Step 4: Simplify right side
    12,419.70x = 169,806,485.30
  5. Step 5: Solve for x
    x = 169,806,485.30/12,419.70
  6. Step 6: Final answer
    x = 13,672.35

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Similar ratio
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1.5x scale

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.