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Finding the Fourth Proportional to 13,646.40, 20,469.60 and 11,342.40

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Solution

The fourth proportional to 13,646.40, 20,469.60 and 11,342.40 is: 17,013.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,646.40 : 20,469.60 = 11,342.40 : x
  2. Step 2: Convert to fraction form
    13,646.40/20,469.60 = 11,342.40/x
  3. Step 3: Cross multiply
    13,646.40x = 20,469.60 × 11,342.40
  4. Step 4: Simplify right side
    13,646.40x = 232,174,391.04
  5. Step 5: Solve for x
    x = 232,174,391.04/13,646.40
  6. Step 6: Final answer
    x = 17,013.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.