Home / 13,228.57-18,255.35-7,178.68

Finding the Fourth Proportional to 13,228.57, 18,255.35 and 7,178.68

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Solution

The fourth proportional to 13,228.57, 18,255.35 and 7,178.68 is: 9,906.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,228.57 : 18,255.35 = 7,178.68 : x
  2. Step 2: Convert to fraction form
    13,228.57/18,255.35 = 7,178.68/x
  3. Step 3: Cross multiply
    13,228.57x = 18,255.35 × 7,178.68
  4. Step 4: Simplify right side
    13,228.57x = 131,049,188.77
  5. Step 5: Solve for x
    x = 131,049,188.77/13,228.57
  6. Step 6: Final answer
    x = 9,906.53

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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.