Home / 7,875.90-11,815.05-2,680.56

Finding the Fourth Proportional to 7,875.90, 11,815.05 and 2,680.56

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Solution

The fourth proportional to 7,875.90, 11,815.05 and 2,680.56 is: 4,021.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,875.90 : 11,815.05 = 2,680.56 : x
  2. Step 2: Convert to fraction form
    7,875.90/11,815.05 = 2,680.56/x
  3. Step 3: Cross multiply
    7,875.90x = 11,815.05 × 2,680.56
  4. Step 4: Simplify right side
    7,875.90x = 31,671,004.79
  5. Step 5: Solve for x
    x = 31,671,004.79/7,875.90
  6. Step 6: Final answer
    x = 4,021.25

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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.