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Finding the Fourth Proportional to 18,280.80, 27,388.80 and 15,688.80

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Solution

The fourth proportional to 18,280.80, 27,388.80 and 15,688.80 is: 23,505.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,280.80 : 27,388.80 = 15,688.80 : x
  2. Step 2: Convert to fraction form
    18,280.80/27,388.80 = 15,688.80/x
  3. Step 3: Cross multiply
    18,280.80x = 27,388.80 × 15,688.80
  4. Step 4: Simplify right side
    18,280.80x = 429,697,405.44
  5. Step 5: Solve for x
    x = 429,697,405.44/18,280.80
  6. Step 6: Final answer
    x = 23,505.39

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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.