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Finding the Fourth Proportional to 10,479.21, 15,713.79 and 4,927.87

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Solution

The fourth proportional to 10,479.21, 15,713.79 and 4,927.87 is: 7,389.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,479.21 : 15,713.79 = 4,927.87 : x
  2. Step 2: Convert to fraction form
    10,479.21/15,713.79 = 4,927.87/x
  3. Step 3: Cross multiply
    10,479.21x = 15,713.79 × 4,927.87
  4. Step 4: Simplify right side
    10,479.21x = 77,435,514.33
  5. Step 5: Solve for x
    x = 77,435,514.33/10,479.21
  6. Step 6: Final answer
    x = 7,389.44

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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.