Home / 12,644.15-18,966.30-5,147.85

Finding the Fourth Proportional to 12,644.15, 18,966.30 and 5,147.85

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Solution

The fourth proportional to 12,644.15, 18,966.30 and 5,147.85 is: 7,721.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,644.15 : 18,966.30 = 5,147.85 : x
  2. Step 2: Convert to fraction form
    12,644.15/18,966.30 = 5,147.85/x
  3. Step 3: Cross multiply
    12,644.15x = 18,966.30 × 5,147.85
  4. Step 4: Simplify right side
    12,644.15x = 97,635,748.23
  5. Step 5: Solve for x
    x = 97,635,748.23/12,644.15
  6. Step 6: Final answer
    x = 7,721.81

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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.