Home / 21,822.38-30,115.08-12,391.14

Finding the Fourth Proportional to 21,822.38, 30,115.08 and 12,391.14

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Solution

The fourth proportional to 21,822.38, 30,115.08 and 12,391.14 is: 17,099.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,822.38 : 30,115.08 = 12,391.14 : x
  2. Step 2: Convert to fraction form
    21,822.38/30,115.08 = 12,391.14/x
  3. Step 3: Cross multiply
    21,822.38x = 30,115.08 × 12,391.14
  4. Step 4: Simplify right side
    21,822.38x = 373,160,172.39
  5. Step 5: Solve for x
    x = 373,160,172.39/21,822.38
  6. Step 6: Final answer
    x = 17,099.89

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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.