Home / 8,765.31-13,128.35-4,078.29

Finding the Fourth Proportional to 8,765.31, 13,128.35 and 4,078.29

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Solution

The fourth proportional to 8,765.31, 13,128.35 and 4,078.29 is: 6,108.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,765.31 : 13,128.35 = 4,078.29 : x
  2. Step 2: Convert to fraction form
    8,765.31/13,128.35 = 4,078.29/x
  3. Step 3: Cross multiply
    8,765.31x = 13,128.35 × 4,078.29
  4. Step 4: Simplify right side
    8,765.31x = 53,541,210.44
  5. Step 5: Solve for x
    x = 53,541,210.44/8,765.31
  6. Step 6: Final answer
    x = 6,108.31

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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.