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Finding the Fourth Proportional to 11,988.87, 17,988.50 and 6,435.72

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Solution

The fourth proportional to 11,988.87, 17,988.50 and 6,435.72 is: 9,656.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,988.87 : 17,988.50 = 6,435.72 : x
  2. Step 2: Convert to fraction form
    11,988.87/17,988.50 = 6,435.72/x
  3. Step 3: Cross multiply
    11,988.87x = 17,988.50 × 6,435.72
  4. Step 4: Simplify right side
    11,988.87x = 115,768,917.04
  5. Step 5: Solve for x
    x = 115,768,917.04/11,988.87
  6. Step 6: Final answer
    x = 9,656.37

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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.