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Finding the Fourth Proportional to 14,431.52, 19,915.48 and 8,143.76

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Solution

The fourth proportional to 14,431.52, 19,915.48 and 8,143.76 is: 11,238.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,431.52 : 19,915.48 = 8,143.76 : x
  2. Step 2: Convert to fraction form
    14,431.52/19,915.48 = 8,143.76/x
  3. Step 3: Cross multiply
    14,431.52x = 19,915.48 × 8,143.76
  4. Step 4: Simplify right side
    14,431.52x = 162,186,889.40
  5. Step 5: Solve for x
    x = 162,186,889.40/14,431.52
  6. Step 6: Final answer
    x = 11,238.38

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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.