Home / 18,936.08-28,418.16-7,100.72

Finding the Fourth Proportional to 18,936.08, 28,418.16 and 7,100.72

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Solution

The fourth proportional to 18,936.08, 28,418.16 and 7,100.72 is: 10,656.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,936.08 : 28,418.16 = 7,100.72 : x
  2. Step 2: Convert to fraction form
    18,936.08/28,418.16 = 7,100.72/x
  3. Step 3: Cross multiply
    18,936.08x = 28,418.16 × 7,100.72
  4. Step 4: Simplify right side
    18,936.08x = 201,789,397.08
  5. Step 5: Solve for x
    x = 201,789,397.08/18,936.08
  6. Step 6: Final answer
    x = 10,656.34

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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.