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Finding the Fourth Proportional to 9,955.91, 13,739.76 and 5,480.64

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Solution

The fourth proportional to 9,955.91, 13,739.76 and 5,480.64 is: 7,563.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,955.91 : 13,739.76 = 5,480.64 : x
  2. Step 2: Convert to fraction form
    9,955.91/13,739.76 = 5,480.64/x
  3. Step 3: Cross multiply
    9,955.91x = 13,739.76 × 5,480.64
  4. Step 4: Simplify right side
    9,955.91x = 75,302,678.25
  5. Step 5: Solve for x
    x = 75,302,678.25/9,955.91
  6. Step 6: Final answer
    x = 7,563.62

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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.