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Finding the Fourth Proportional to 17,131.40, 25,699.80 and 5,445.80

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Solution

The fourth proportional to 17,131.40, 25,699.80 and 5,445.80 is: 8,169.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,131.40 : 25,699.80 = 5,445.80 : x
  2. Step 2: Convert to fraction form
    17,131.40/25,699.80 = 5,445.80/x
  3. Step 3: Cross multiply
    17,131.40x = 25,699.80 × 5,445.80
  4. Step 4: Simplify right side
    17,131.40x = 139,955,970.84
  5. Step 5: Solve for x
    x = 139,955,970.84/17,131.40
  6. Step 6: Final answer
    x = 8,169.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.