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Finding the Fourth Proportional to 11,921.58, 17,841.06 and 7,239.24

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Solution

The fourth proportional to 11,921.58, 17,841.06 and 7,239.24 is: 10,833.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,921.58 : 17,841.06 = 7,239.24 : x
  2. Step 2: Convert to fraction form
    11,921.58/17,841.06 = 7,239.24/x
  3. Step 3: Cross multiply
    11,921.58x = 17,841.06 × 7,239.24
  4. Step 4: Simplify right side
    11,921.58x = 129,155,715.19
  5. Step 5: Solve for x
    x = 129,155,715.19/11,921.58
  6. Step 6: Final answer
    x = 10,833.77

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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.