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Finding the Fourth Proportional to 7,929, 11,953.13 and 7,393.86

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Solution

The fourth proportional to 7,929, 11,953.13 and 7,393.86 is: 11,146.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,929 : 11,953.13 = 7,393.86 : x
  2. Step 2: Convert to fraction form
    7,929/11,953.13 = 7,393.86/x
  3. Step 3: Cross multiply
    7,929x = 11,953.13 × 7,393.86
  4. Step 4: Simplify right side
    7,929x = 88,379,732.81
  5. Step 5: Solve for x
    x = 88,379,732.81/7,929
  6. Step 6: Final answer
    x = 11,146.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.