Home / 12,655.90-18,983.58-3,890.62

Finding the Fourth Proportional to 12,655.90, 18,983.58 and 3,890.62

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Solution

The fourth proportional to 12,655.90, 18,983.58 and 3,890.62 is: 5,835.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,655.90 : 18,983.58 = 3,890.62 : x
  2. Step 2: Convert to fraction form
    12,655.90/18,983.58 = 3,890.62/x
  3. Step 3: Cross multiply
    12,655.90x = 18,983.58 × 3,890.62
  4. Step 4: Simplify right side
    12,655.90x = 73,857,896.02
  5. Step 5: Solve for x
    x = 73,857,896.02/12,655.90
  6. Step 6: Final answer
    x = 5,835.85

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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.