Home / 12,200.30-18,300.95-3,880.11

Finding the Fourth Proportional to 12,200.30, 18,300.95 and 3,880.11

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Solution

The fourth proportional to 12,200.30, 18,300.95 and 3,880.11 is: 5,820.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,200.30 : 18,300.95 = 3,880.11 : x
  2. Step 2: Convert to fraction form
    12,200.30/18,300.95 = 3,880.11/x
  3. Step 3: Cross multiply
    12,200.30x = 18,300.95 × 3,880.11
  4. Step 4: Simplify right side
    12,200.30x = 71,009,699.10
  5. Step 5: Solve for x
    x = 71,009,699.10/12,200.30
  6. Step 6: Final answer
    x = 5,820.32

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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.