Home / 11,149.12-15,385.78-6,433.40

Finding the Fourth Proportional to 11,149.12, 15,385.78 and 6,433.40

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Solution

The fourth proportional to 11,149.12, 15,385.78 and 6,433.40 is: 8,878.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,149.12 : 15,385.78 = 6,433.40 : x
  2. Step 2: Convert to fraction form
    11,149.12/15,385.78 = 6,433.40/x
  3. Step 3: Cross multiply
    11,149.12x = 15,385.78 × 6,433.40
  4. Step 4: Simplify right side
    11,149.12x = 98,982,877.05
  5. Step 5: Solve for x
    x = 98,982,877.05/11,149.12
  6. Step 6: Final answer
    x = 8,878.09

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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.