Home / 9,861.55-13,608.95-5,385.38

Finding the Fourth Proportional to 9,861.55, 13,608.95 and 5,385.38

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Solution

The fourth proportional to 9,861.55, 13,608.95 and 5,385.38 is: 7,431.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,861.55 : 13,608.95 = 5,385.38 : x
  2. Step 2: Convert to fraction form
    9,861.55/13,608.95 = 5,385.38/x
  3. Step 3: Cross multiply
    9,861.55x = 13,608.95 × 5,385.38
  4. Step 4: Simplify right side
    9,861.55x = 73,289,272.18
  5. Step 5: Solve for x
    x = 73,289,272.18/9,861.55
  6. Step 6: Final answer
    x = 7,431.82

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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.