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Finding the Fourth Proportional to 12,489.84, 17,236.98 and 7,455.60

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Solution

The fourth proportional to 12,489.84, 17,236.98 and 7,455.60 is: 10,289.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,489.84 : 17,236.98 = 7,455.60 : x
  2. Step 2: Convert to fraction form
    12,489.84/17,236.98 = 7,455.60/x
  3. Step 3: Cross multiply
    12,489.84x = 17,236.98 × 7,455.60
  4. Step 4: Simplify right side
    12,489.84x = 128,512,028.09
  5. Step 5: Solve for x
    x = 128,512,028.09/12,489.84
  6. Step 6: Final answer
    x = 10,289.33

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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.