Home / 12,678.72-18,985.28-11,268.16

Finding the Fourth Proportional to 12,678.72, 18,985.28 and 11,268.16

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Solution

The fourth proportional to 12,678.72, 18,985.28 and 11,268.16 is: 16,873.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,678.72 : 18,985.28 = 11,268.16 : x
  2. Step 2: Convert to fraction form
    12,678.72/18,985.28 = 11,268.16/x
  3. Step 3: Cross multiply
    12,678.72x = 18,985.28 × 11,268.16
  4. Step 4: Simplify right side
    12,678.72x = 213,929,172.68
  5. Step 5: Solve for x
    x = 213,929,172.68/12,678.72
  6. Step 6: Final answer
    x = 16,873.09

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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.