Home / 7,620.78-11,430.80-4,460.00

Finding the Fourth Proportional to 7,620.78, 11,430.80 and 4,460.00

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Solution

The fourth proportional to 7,620.78, 11,430.80 and 4,460.00 is: 6,689.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,620.78 : 11,430.80 = 4,460.00 : x
  2. Step 2: Convert to fraction form
    7,620.78/11,430.80 = 4,460.00/x
  3. Step 3: Cross multiply
    7,620.78x = 11,430.80 × 4,460.00
  4. Step 4: Simplify right side
    7,620.78x = 50,981,340.95
  5. Step 5: Solve for x
    x = 50,981,340.95/7,620.78
  6. Step 6: Final answer
    x = 6,689.78

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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.