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Finding the Fourth Proportional to 14,479.88, 21,719.82 and 5,114.81

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Solution

The fourth proportional to 14,479.88, 21,719.82 and 5,114.81 is: 7,672.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,479.88 : 21,719.82 = 5,114.81 : x
  2. Step 2: Convert to fraction form
    14,479.88/21,719.82 = 5,114.81/x
  3. Step 3: Cross multiply
    14,479.88x = 21,719.82 × 5,114.81
  4. Step 4: Simplify right side
    14,479.88x = 111,092,643.94
  5. Step 5: Solve for x
    x = 111,092,643.94/14,479.88
  6. Step 6: Final answer
    x = 7,672.21

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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.