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Finding the Fourth Proportional to 12,798.78, 17,661.87 and 7,133.34

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Solution

The fourth proportional to 12,798.78, 17,661.87 and 7,133.34 is: 9,843.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,798.78 : 17,661.87 = 7,133.34 : x
  2. Step 2: Convert to fraction form
    12,798.78/17,661.87 = 7,133.34/x
  3. Step 3: Cross multiply
    12,798.78x = 17,661.87 × 7,133.34
  4. Step 4: Simplify right side
    12,798.78x = 125,988,123.75
  5. Step 5: Solve for x
    x = 125,988,123.75/12,798.78
  6. Step 6: Final answer
    x = 9,843.76

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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.