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Finding the Fourth Proportional to 8,661.98, 11,952 and 5,123.90

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Solution

The fourth proportional to 8,661.98, 11,952 and 5,123.90 is: 7,070.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,661.98 : 11,952 = 5,123.90 : x
  2. Step 2: Convert to fraction form
    8,661.98/11,952 = 5,123.90/x
  3. Step 3: Cross multiply
    8,661.98x = 11,952 × 5,123.90
  4. Step 4: Simplify right side
    8,661.98x = 61,240,852.80
  5. Step 5: Solve for x
    x = 61,240,852.80/8,661.98
  6. Step 6: Final answer
    x = 7,070.08

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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.