Home / 18,918.72-28,368.64-11,023.84

Finding the Fourth Proportional to 18,918.72, 28,368.64 and 11,023.84

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Solution

The fourth proportional to 18,918.72, 28,368.64 and 11,023.84 is: 16,530.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,918.72 : 28,368.64 = 11,023.84 : x
  2. Step 2: Convert to fraction form
    18,918.72/28,368.64 = 11,023.84/x
  3. Step 3: Cross multiply
    18,918.72x = 28,368.64 × 11,023.84
  4. Step 4: Simplify right side
    18,918.72x = 312,731,348.38
  5. Step 5: Solve for x
    x = 312,731,348.38/18,918.72
  6. Step 6: Final answer
    x = 16,530.26

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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.