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Finding the Fourth Proportional to 19,915.20, 27,507.60 and 14,601.60

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Solution

The fourth proportional to 19,915.20, 27,507.60 and 14,601.60 is: 20,168.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,915.20 : 27,507.60 = 14,601.60 : x
  2. Step 2: Convert to fraction form
    19,915.20/27,507.60 = 14,601.60/x
  3. Step 3: Cross multiply
    19,915.20x = 27,507.60 × 14,601.60
  4. Step 4: Simplify right side
    19,915.20x = 401,654,972.16
  5. Step 5: Solve for x
    x = 401,654,972.16/19,915.20
  6. Step 6: Final answer
    x = 20,168.26

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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.