Home / 12,419.30-18,629.40-3,655.10

Finding the Fourth Proportional to 12,419.30, 18,629.40 and 3,655.10

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Solution

The fourth proportional to 12,419.30, 18,629.40 and 3,655.10 is: 5,482.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,419.30 : 18,629.40 = 3,655.10 : x
  2. Step 2: Convert to fraction form
    12,419.30/18,629.40 = 3,655.10/x
  3. Step 3: Cross multiply
    12,419.30x = 18,629.40 × 3,655.10
  4. Step 4: Simplify right side
    12,419.30x = 68,092,319.94
  5. Step 5: Solve for x
    x = 68,092,319.94/12,419.30
  6. Step 6: Final answer
    x = 5,482.78

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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.