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Finding the Fourth Proportional to 13,969.60, 20,954.40 and 11,345.20

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Solution

The fourth proportional to 13,969.60, 20,954.40 and 11,345.20 is: 17,017.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,969.60 : 20,954.40 = 11,345.20 : x
  2. Step 2: Convert to fraction form
    13,969.60/20,954.40 = 11,345.20/x
  3. Step 3: Cross multiply
    13,969.60x = 20,954.40 × 11,345.20
  4. Step 4: Simplify right side
    13,969.60x = 237,731,858.88
  5. Step 5: Solve for x
    x = 237,731,858.88/13,969.60
  6. Step 6: Final answer
    x = 17,017.80

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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.