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Finding the Fourth Proportional to 9,955.52, 13,739.25 and 5,921.25

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Solution

The fourth proportional to 9,955.52, 13,739.25 and 5,921.25 is: 8,171.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,955.52 : 13,739.25 = 5,921.25 : x
  2. Step 2: Convert to fraction form
    9,955.52/13,739.25 = 5,921.25/x
  3. Step 3: Cross multiply
    9,955.52x = 13,739.25 × 5,921.25
  4. Step 4: Simplify right side
    9,955.52x = 81,353,534.06
  5. Step 5: Solve for x
    x = 81,353,534.06/9,955.52
  6. Step 6: Final answer
    x = 8,171.70

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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.