Home / 8,585.30-12,871.80-3,315.80

Finding the Fourth Proportional to 8,585.30, 12,871.80 and 3,315.80

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Solution

The fourth proportional to 8,585.30, 12,871.80 and 3,315.80 is: 4,971.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,585.30 : 12,871.80 = 3,315.80 : x
  2. Step 2: Convert to fraction form
    8,585.30/12,871.80 = 3,315.80/x
  3. Step 3: Cross multiply
    8,585.30x = 12,871.80 × 3,315.80
  4. Step 4: Simplify right side
    8,585.30x = 42,680,314.44
  5. Step 5: Solve for x
    x = 42,680,314.44/8,585.30
  6. Step 6: Final answer
    x = 4,971.32

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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.