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Finding the Fourth Proportional to 9,939.74, 13,728.86 and 7,246.69

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Solution

The fourth proportional to 9,939.74, 13,728.86 and 7,246.69 is: 10,009.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,939.74 : 13,728.86 = 7,246.69 : x
  2. Step 2: Convert to fraction form
    9,939.74/13,728.86 = 7,246.69/x
  3. Step 3: Cross multiply
    9,939.74x = 13,728.86 × 7,246.69
  4. Step 4: Simplify right side
    9,939.74x = 99,488,749.09
  5. Step 5: Solve for x
    x = 99,488,749.09/9,939.74
  6. Step 6: Final answer
    x = 10,009.20

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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.