Home / 11,780.31-16,260.62-7,542.78

Finding the Fourth Proportional to 11,780.31, 16,260.62 and 7,542.78

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Solution

The fourth proportional to 11,780.31, 16,260.62 and 7,542.78 is: 10,411.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,780.31 : 16,260.62 = 7,542.78 : x
  2. Step 2: Convert to fraction form
    11,780.31/16,260.62 = 7,542.78/x
  3. Step 3: Cross multiply
    11,780.31x = 16,260.62 × 7,542.78
  4. Step 4: Simplify right side
    11,780.31x = 122,650,339.05
  5. Step 5: Solve for x
    x = 122,650,339.05/11,780.31
  6. Step 6: Final answer
    x = 10,411.47

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1.5x scale

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.