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Finding the Fourth Proportional to 18,102.40, 27,153.60 and 13,148.80

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Solution

The fourth proportional to 18,102.40, 27,153.60 and 13,148.80 is: 19,723.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,102.40 : 27,153.60 = 13,148.80 : x
  2. Step 2: Convert to fraction form
    18,102.40/27,153.60 = 13,148.80/x
  3. Step 3: Cross multiply
    18,102.40x = 27,153.60 × 13,148.80
  4. Step 4: Simplify right side
    18,102.40x = 357,037,255.68
  5. Step 5: Solve for x
    x = 357,037,255.68/18,102.40
  6. Step 6: Final answer
    x = 19,723.20

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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.