Home / 11,920.20-16,444.58-8,385.72

Finding the Fourth Proportional to 11,920.20, 16,444.58 and 8,385.72

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Solution

The fourth proportional to 11,920.20, 16,444.58 and 8,385.72 is: 11,568.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,920.20 : 16,444.58 = 8,385.72 : x
  2. Step 2: Convert to fraction form
    11,920.20/16,444.58 = 8,385.72/x
  3. Step 3: Cross multiply
    11,920.20x = 16,444.58 × 8,385.72
  4. Step 4: Simplify right side
    11,920.20x = 137,899,643.40
  5. Step 5: Solve for x
    x = 137,899,643.40/11,920.20
  6. Step 6: Final answer
    x = 11,568.57

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Double scale
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Similar ratio
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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.