Home / 8,119.88-11,210.60-6,631.35

Finding the Fourth Proportional to 8,119.88, 11,210.60 and 6,631.35

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Solution

The fourth proportional to 8,119.88, 11,210.60 and 6,631.35 is: 9,155.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,119.88 : 11,210.60 = 6,631.35 : x
  2. Step 2: Convert to fraction form
    8,119.88/11,210.60 = 6,631.35/x
  3. Step 3: Cross multiply
    8,119.88x = 11,210.60 × 6,631.35
  4. Step 4: Simplify right side
    8,119.88x = 74,341,379.15
  5. Step 5: Solve for x
    x = 74,341,379.15/8,119.88
  6. Step 6: Final answer
    x = 9,155.48

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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.