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Finding the Fourth Proportional to 18,998.40, 28,513.80 and 8,484.60

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Solution

The fourth proportional to 18,998.40, 28,513.80 and 8,484.60 is: 12,734.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,998.40 : 28,513.80 = 8,484.60 : x
  2. Step 2: Convert to fraction form
    18,998.40/28,513.80 = 8,484.60/x
  3. Step 3: Cross multiply
    18,998.40x = 28,513.80 × 8,484.60
  4. Step 4: Simplify right side
    18,998.40x = 241,928,187.48
  5. Step 5: Solve for x
    x = 241,928,187.48/18,998.40
  6. Step 6: Final answer
    x = 12,734.13

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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.