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Finding the Fourth Proportional to 7,177.88, 9,905.71 and 4,345.79

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Solution

The fourth proportional to 7,177.88, 9,905.71 and 4,345.79 is: 5,997.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,177.88 : 9,905.71 = 4,345.79 : x
  2. Step 2: Convert to fraction form
    7,177.88/9,905.71 = 4,345.79/x
  3. Step 3: Cross multiply
    7,177.88x = 9,905.71 × 4,345.79
  4. Step 4: Simplify right side
    7,177.88x = 43,048,106.67
  5. Step 5: Solve for x
    x = 43,048,106.67/7,177.88
  6. Step 6: Final answer
    x = 5,997.33

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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.