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Finding the Fourth Proportional to 18,300.40, 27,450.60 and 8,458.90

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Solution

The fourth proportional to 18,300.40, 27,450.60 and 8,458.90 is: 12,688.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,300.40 : 27,450.60 = 8,458.90 : x
  2. Step 2: Convert to fraction form
    18,300.40/27,450.60 = 8,458.90/x
  3. Step 3: Cross multiply
    18,300.40x = 27,450.60 × 8,458.90
  4. Step 4: Simplify right side
    18,300.40x = 232,201,880.34
  5. Step 5: Solve for x
    x = 232,201,880.34/18,300.40
  6. Step 6: Final answer
    x = 12,688.35

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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.