Home / 8,139.10-12,210.54-3,208.36

Finding the Fourth Proportional to 8,139.10, 12,210.54 and 3,208.36

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Solution

The fourth proportional to 8,139.10, 12,210.54 and 3,208.36 is: 4,813.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,139.10 : 12,210.54 = 3,208.36 : x
  2. Step 2: Convert to fraction form
    8,139.10/12,210.54 = 3,208.36/x
  3. Step 3: Cross multiply
    8,139.10x = 12,210.54 × 3,208.36
  4. Step 4: Simplify right side
    8,139.10x = 39,175,808.11
  5. Step 5: Solve for x
    x = 39,175,808.11/8,139.10
  6. Step 6: Final answer
    x = 4,813.29

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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.