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Finding the Fourth Proportional to 18,296.80, 27,445.20 and 13,688.80

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Solution

The fourth proportional to 18,296.80, 27,445.20 and 13,688.80 is: 20,533.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,296.80 : 27,445.20 = 13,688.80 : x
  2. Step 2: Convert to fraction form
    18,296.80/27,445.20 = 13,688.80/x
  3. Step 3: Cross multiply
    18,296.80x = 27,445.20 × 13,688.80
  4. Step 4: Simplify right side
    18,296.80x = 375,691,853.76
  5. Step 5: Solve for x
    x = 375,691,853.76/18,296.80
  6. Step 6: Final answer
    x = 20,533.20

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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.