Home / 12,189.72-16,813.26-7,475.88

Finding the Fourth Proportional to 12,189.72, 16,813.26 and 7,475.88

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Solution

The fourth proportional to 12,189.72, 16,813.26 and 7,475.88 is: 10,311.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,189.72 : 16,813.26 = 7,475.88 : x
  2. Step 2: Convert to fraction form
    12,189.72/16,813.26 = 7,475.88/x
  3. Step 3: Cross multiply
    12,189.72x = 16,813.26 × 7,475.88
  4. Step 4: Simplify right side
    12,189.72x = 125,693,914.17
  5. Step 5: Solve for x
    x = 125,693,914.17/12,189.72
  6. Step 6: Final answer
    x = 10,311.47

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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.