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Finding the Fourth Proportional to 12,386.54, 18,568.87 and 9,477.83

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Solution

The fourth proportional to 12,386.54, 18,568.87 and 9,477.83 is: 14,208.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,386.54 : 18,568.87 = 9,477.83 : x
  2. Step 2: Convert to fraction form
    12,386.54/18,568.87 = 9,477.83/x
  3. Step 3: Cross multiply
    12,386.54x = 18,568.87 × 9,477.83
  4. Step 4: Simplify right side
    12,386.54x = 175,992,593.15
  5. Step 5: Solve for x
    x = 175,992,593.15/12,386.54
  6. Step 6: Final answer
    x = 14,208.37

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1.5x scale

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.