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Finding the Fourth Proportional to 11,539.80, 17,325.90 and 7,165.80

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Solution

The fourth proportional to 11,539.80, 17,325.90 and 7,165.80 is: 10,758.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,539.80 : 17,325.90 = 7,165.80 : x
  2. Step 2: Convert to fraction form
    11,539.80/17,325.90 = 7,165.80/x
  3. Step 3: Cross multiply
    11,539.80x = 17,325.90 × 7,165.80
  4. Step 4: Simplify right side
    11,539.80x = 124,153,934.22
  5. Step 5: Solve for x
    x = 124,153,934.22/11,539.80
  6. Step 6: Final answer
    x = 10,758.76

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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.