Home / 12,379.77-18,564.80-6,454.89

Finding the Fourth Proportional to 12,379.77, 18,564.80 and 6,454.89

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Solution

The fourth proportional to 12,379.77, 18,564.80 and 6,454.89 is: 9,679.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,379.77 : 18,564.80 = 6,454.89 : x
  2. Step 2: Convert to fraction form
    12,379.77/18,564.80 = 6,454.89/x
  3. Step 3: Cross multiply
    12,379.77x = 18,564.80 × 6,454.89
  4. Step 4: Simplify right side
    12,379.77x = 119,833,709.60
  5. Step 5: Solve for x
    x = 119,833,709.60/12,379.77
  6. Step 6: Final answer
    x = 9,679.80

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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.