Home / 9,861.36-13,608.70-5,385.20

Finding the Fourth Proportional to 9,861.36, 13,608.70 and 5,385.20

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Solution

The fourth proportional to 9,861.36, 13,608.70 and 5,385.20 is: 7,431.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,861.36 : 13,608.70 = 5,385.20 : x
  2. Step 2: Convert to fraction form
    9,861.36/13,608.70 = 5,385.20/x
  3. Step 3: Cross multiply
    9,861.36x = 13,608.70 × 5,385.20
  4. Step 4: Simplify right side
    9,861.36x = 73,285,571.24
  5. Step 5: Solve for x
    x = 73,285,571.24/9,861.36
  6. Step 6: Final answer
    x = 7,431.59

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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.