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Finding the Fourth Proportional to 15,361.67, 21,199.91 and 9,391.64

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Solution

The fourth proportional to 15,361.67, 21,199.91 and 9,391.64 is: 12,960.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,361.67 : 21,199.91 = 9,391.64 : x
  2. Step 2: Convert to fraction form
    15,361.67/21,199.91 = 9,391.64/x
  3. Step 3: Cross multiply
    15,361.67x = 21,199.91 × 9,391.64
  4. Step 4: Simplify right side
    15,361.67x = 199,101,769.79
  5. Step 5: Solve for x
    x = 199,101,769.79/15,361.67
  6. Step 6: Final answer
    x = 12,960.95

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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.