Home / 9,861.29-13,608.20-5,385.05

Finding the Fourth Proportional to 9,861.29, 13,608.20 and 5,385.05

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Solution

The fourth proportional to 9,861.29, 13,608.20 and 5,385.05 is: 7,431.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,861.29 : 13,608.20 = 5,385.05 : x
  2. Step 2: Convert to fraction form
    9,861.29/13,608.20 = 5,385.05/x
  3. Step 3: Cross multiply
    9,861.29x = 13,608.20 × 5,385.05
  4. Step 4: Simplify right side
    9,861.29x = 73,280,742.44
  5. Step 5: Solve for x
    x = 73,280,742.44/9,861.29
  6. Step 6: Final answer
    x = 7,431.15

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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.