Home / 13,221.32-18,230.46-8,434.86

Finding the Fourth Proportional to 13,221.32, 18,230.46 and 8,434.86

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Solution

The fourth proportional to 13,221.32, 18,230.46 and 8,434.86 is: 11,630.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,221.32 : 18,230.46 = 8,434.86 : x
  2. Step 2: Convert to fraction form
    13,221.32/18,230.46 = 8,434.86/x
  3. Step 3: Cross multiply
    13,221.32x = 18,230.46 × 8,434.86
  4. Step 4: Simplify right side
    13,221.32x = 153,771,377.84
  5. Step 5: Solve for x
    x = 153,771,377.84/13,221.32
  6. Step 6: Final answer
    x = 11,630.57

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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.