Home / 5,124.78-7,687.20-1,838.40

Finding the Fourth Proportional to 5,124.78, 7,687.20 and 1,838.40

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Solution

The fourth proportional to 5,124.78, 7,687.20 and 1,838.40 is: 2,757.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,124.78 : 7,687.20 = 1,838.40 : x
  2. Step 2: Convert to fraction form
    5,124.78/7,687.20 = 1,838.40/x
  3. Step 3: Cross multiply
    5,124.78x = 7,687.20 × 1,838.40
  4. Step 4: Simplify right side
    5,124.78x = 14,132,148.48
  5. Step 5: Solve for x
    x = 14,132,148.48/5,124.78
  6. Step 6: Final answer
    x = 2,757.61

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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.