Home / 8,765.10-13,147.68-3,218.90

Finding the Fourth Proportional to 8,765.10, 13,147.68 and 3,218.90

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Solution

The fourth proportional to 8,765.10, 13,147.68 and 3,218.90 is: 4,828.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,765.10 : 13,147.68 = 3,218.90 : x
  2. Step 2: Convert to fraction form
    8,765.10/13,147.68 = 3,218.90/x
  3. Step 3: Cross multiply
    8,765.10x = 13,147.68 × 3,218.90
  4. Step 4: Simplify right side
    8,765.10x = 42,321,001.41
  5. Step 5: Solve for x
    x = 42,321,001.41/8,765.10
  6. Step 6: Final answer
    x = 4,828.35

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1.5x scale

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.