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Finding the Fourth Proportional to 13,287.60, 19,924.20 and 5,487.60

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Solution

The fourth proportional to 13,287.60, 19,924.20 and 5,487.60 is: 8,228.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,287.60 : 19,924.20 = 5,487.60 : x
  2. Step 2: Convert to fraction form
    13,287.60/19,924.20 = 5,487.60/x
  3. Step 3: Cross multiply
    13,287.60x = 19,924.20 × 5,487.60
  4. Step 4: Simplify right side
    13,287.60x = 109,336,039.92
  5. Step 5: Solve for x
    x = 109,336,039.92/13,287.60
  6. Step 6: Final answer
    x = 8,228.43

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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.