Home / 12,390.15-18,568.32-5,268.45

Finding the Fourth Proportional to 12,390.15, 18,568.32 and 5,268.45

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Solution

The fourth proportional to 12,390.15, 18,568.32 and 5,268.45 is: 7,895.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,390.15 : 18,568.32 = 5,268.45 : x
  2. Step 2: Convert to fraction form
    12,390.15/18,568.32 = 5,268.45/x
  3. Step 3: Cross multiply
    12,390.15x = 18,568.32 × 5,268.45
  4. Step 4: Simplify right side
    12,390.15x = 97,826,265.50
  5. Step 5: Solve for x
    x = 97,826,265.50/12,390.15
  6. Step 6: Final answer
    x = 7,895.49

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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.