Home / 21,768.62-30,027.92-13,689.47

Finding the Fourth Proportional to 21,768.62, 30,027.92 and 13,689.47

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Solution

The fourth proportional to 21,768.62, 30,027.92 and 13,689.47 is: 18,883.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,768.62 : 30,027.92 = 13,689.47 : x
  2. Step 2: Convert to fraction form
    21,768.62/30,027.92 = 13,689.47/x
  3. Step 3: Cross multiply
    21,768.62x = 30,027.92 × 13,689.47
  4. Step 4: Simplify right side
    21,768.62x = 411,066,316.62
  5. Step 5: Solve for x
    x = 411,066,316.62/21,768.62
  6. Step 6: Final answer
    x = 18,883.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.