Home / 12,529.89-18,778.43-5,125.68

Finding the Fourth Proportional to 12,529.89, 18,778.43 and 5,125.68

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Solution

The fourth proportional to 12,529.89, 18,778.43 and 5,125.68 is: 7,681.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,529.89 : 18,778.43 = 5,125.68 : x
  2. Step 2: Convert to fraction form
    12,529.89/18,778.43 = 5,125.68/x
  3. Step 3: Cross multiply
    12,529.89x = 18,778.43 × 5,125.68
  4. Step 4: Simplify right side
    12,529.89x = 96,252,235.90
  5. Step 5: Solve for x
    x = 96,252,235.90/12,529.89
  6. Step 6: Final answer
    x = 7,681.81

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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.