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Finding the Fourth Proportional to 7,998.78, 11,034.40 and 5,168.58

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Solution

The fourth proportional to 7,998.78, 11,034.40 and 5,168.58 is: 7,130.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,998.78 : 11,034.40 = 5,168.58 : x
  2. Step 2: Convert to fraction form
    7,998.78/11,034.40 = 5,168.58/x
  3. Step 3: Cross multiply
    7,998.78x = 11,034.40 × 5,168.58
  4. Step 4: Simplify right side
    7,998.78x = 57,032,182.74
  5. Step 5: Solve for x
    x = 57,032,182.74/7,998.78
  6. Step 6: Final answer
    x = 7,130.11

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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.