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Finding the Fourth Proportional to 12,913.88, 17,821.15 and 7,324.88

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Solution

The fourth proportional to 12,913.88, 17,821.15 and 7,324.88 is: 10,108.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,913.88 : 17,821.15 = 7,324.88 : x
  2. Step 2: Convert to fraction form
    12,913.88/17,821.15 = 7,324.88/x
  3. Step 3: Cross multiply
    12,913.88x = 17,821.15 × 7,324.88
  4. Step 4: Simplify right side
    12,913.88x = 130,537,785.21
  5. Step 5: Solve for x
    x = 130,537,785.21/12,913.88
  6. Step 6: Final answer
    x = 10,108.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.