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Finding the Fourth Proportional to 17,611.12, 26,421 and 5,131.25

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Solution

The fourth proportional to 17,611.12, 26,421 and 5,131.25 is: 7,698.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,611.12 : 26,421 = 5,131.25 : x
  2. Step 2: Convert to fraction form
    17,611.12/26,421 = 5,131.25/x
  3. Step 3: Cross multiply
    17,611.12x = 26,421 × 5,131.25
  4. Step 4: Simplify right side
    17,611.12x = 135,572,756.25
  5. Step 5: Solve for x
    x = 135,572,756.25/17,611.12
  6. Step 6: Final answer
    x = 7,698.13

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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.