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Finding the Fourth Proportional to 13,257.60, 19,929.60 and 9,388.80

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Solution

The fourth proportional to 13,257.60, 19,929.60 and 9,388.80 is: 14,113.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,257.60 : 19,929.60 = 9,388.80 : x
  2. Step 2: Convert to fraction form
    13,257.60/19,929.60 = 9,388.80/x
  3. Step 3: Cross multiply
    13,257.60x = 19,929.60 × 9,388.80
  4. Step 4: Simplify right side
    13,257.60x = 187,115,028.48
  5. Step 5: Solve for x
    x = 187,115,028.48/13,257.60
  6. Step 6: Final answer
    x = 14,113.79

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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.