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Finding the Fourth Proportional to 8,991.30, 12,379.75 and 7,644.26

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Solution

The fourth proportional to 8,991.30, 12,379.75 and 7,644.26 is: 10,525.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,991.30 : 12,379.75 = 7,644.26 : x
  2. Step 2: Convert to fraction form
    8,991.30/12,379.75 = 7,644.26/x
  3. Step 3: Cross multiply
    8,991.30x = 12,379.75 × 7,644.26
  4. Step 4: Simplify right side
    8,991.30x = 94,634,027.74
  5. Step 5: Solve for x
    x = 94,634,027.74/8,991.30
  6. Step 6: Final answer
    x = 10,525.07

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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.