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Finding the Fourth Proportional to 13,159.60, 19,710.60 and 11,431.60

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Solution

The fourth proportional to 13,159.60, 19,710.60 and 11,431.60 is: 17,122.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,159.60 : 19,710.60 = 11,431.60 : x
  2. Step 2: Convert to fraction form
    13,159.60/19,710.60 = 11,431.60/x
  3. Step 3: Cross multiply
    13,159.60x = 19,710.60 × 11,431.60
  4. Step 4: Simplify right side
    13,159.60x = 225,323,694.96
  5. Step 5: Solve for x
    x = 225,323,694.96/13,159.60
  6. Step 6: Final answer
    x = 17,122.38

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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.