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Finding the Fourth Proportional to 13,239.60, 19,936.50 and 9,783.60

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Solution

The fourth proportional to 13,239.60, 19,936.50 and 9,783.60 is: 14,732.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,239.60 : 19,936.50 = 9,783.60 : x
  2. Step 2: Convert to fraction form
    13,239.60/19,936.50 = 9,783.60/x
  3. Step 3: Cross multiply
    13,239.60x = 19,936.50 × 9,783.60
  4. Step 4: Simplify right side
    13,239.60x = 195,050,741.40
  5. Step 5: Solve for x
    x = 195,050,741.40/13,239.60
  6. Step 6: Final answer
    x = 14,732.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.