Home / 12,243.12-16,903.26-8,421.03

Finding the Fourth Proportional to 12,243.12, 16,903.26 and 8,421.03

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Solution

The fourth proportional to 12,243.12, 16,903.26 and 8,421.03 is: 11,626.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,243.12 : 16,903.26 = 8,421.03 : x
  2. Step 2: Convert to fraction form
    12,243.12/16,903.26 = 8,421.03/x
  3. Step 3: Cross multiply
    12,243.12x = 16,903.26 × 8,421.03
  4. Step 4: Simplify right side
    12,243.12x = 142,342,859.56
  5. Step 5: Solve for x
    x = 142,342,859.56/12,243.12
  6. Step 6: Final answer
    x = 11,626.36

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Half scale
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Double scale
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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.