Home / 12,305.75-18,465.79-5,189.55

Finding the Fourth Proportional to 12,305.75, 18,465.79 and 5,189.55

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Solution

The fourth proportional to 12,305.75, 18,465.79 and 5,189.55 is: 7,787.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,305.75 : 18,465.79 = 5,189.55 : x
  2. Step 2: Convert to fraction form
    12,305.75/18,465.79 = 5,189.55/x
  3. Step 3: Cross multiply
    12,305.75x = 18,465.79 × 5,189.55
  4. Step 4: Simplify right side
    12,305.75x = 95,829,137.25
  5. Step 5: Solve for x
    x = 95,829,137.25/12,305.75
  6. Step 6: Final answer
    x = 7,787.35

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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.