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Finding the Fourth Proportional to 28,297.80, 42,446.70 and 18,318.60

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Solution

The fourth proportional to 28,297.80, 42,446.70 and 18,318.60 is: 27,477.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,297.80 : 42,446.70 = 18,318.60 : x
  2. Step 2: Convert to fraction form
    28,297.80/42,446.70 = 18,318.60/x
  3. Step 3: Cross multiply
    28,297.80x = 42,446.70 × 18,318.60
  4. Step 4: Simplify right side
    28,297.80x = 777,564,118.62
  5. Step 5: Solve for x
    x = 777,564,118.62/28,297.80
  6. Step 6: Final answer
    x = 27,477.90

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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.