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Finding the Fourth Proportional to 13,149, 19,712.46 and 5,363.40

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Solution

The fourth proportional to 13,149, 19,712.46 and 5,363.40 is: 8,040.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,149 : 19,712.46 = 5,363.40 : x
  2. Step 2: Convert to fraction form
    13,149/19,712.46 = 5,363.40/x
  3. Step 3: Cross multiply
    13,149x = 19,712.46 × 5,363.40
  4. Step 4: Simplify right side
    13,149x = 105,725,807.96
  5. Step 5: Solve for x
    x = 105,725,807.96/13,149
  6. Step 6: Final answer
    x = 8,040.60

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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.