Home / 9,780.78-14,672.40-3,205.20

Finding the Fourth Proportional to 9,780.78, 14,672.40 and 3,205.20

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Solution

The fourth proportional to 9,780.78, 14,672.40 and 3,205.20 is: 4,808.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,780.78 : 14,672.40 = 3,205.20 : x
  2. Step 2: Convert to fraction form
    9,780.78/14,672.40 = 3,205.20/x
  3. Step 3: Cross multiply
    9,780.78x = 14,672.40 × 3,205.20
  4. Step 4: Simplify right side
    9,780.78x = 47,027,976.48
  5. Step 5: Solve for x
    x = 47,027,976.48/9,780.78
  6. Step 6: Final answer
    x = 4,808.20

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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.