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Finding the Fourth Proportional to 15,122.84, 20,885.46 and 13,473.68

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Solution

The fourth proportional to 15,122.84, 20,885.46 and 13,473.68 is: 18,607.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,122.84 : 20,885.46 = 13,473.68 : x
  2. Step 2: Convert to fraction form
    15,122.84/20,885.46 = 13,473.68/x
  3. Step 3: Cross multiply
    15,122.84x = 20,885.46 × 13,473.68
  4. Step 4: Simplify right side
    15,122.84x = 281,404,004.69
  5. Step 5: Solve for x
    x = 281,404,004.69/15,122.84
  6. Step 6: Final answer
    x = 18,607.88

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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.