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Finding the Fourth Proportional to 18,876.40, 28,330.80 and 8,362.60

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Solution

The fourth proportional to 18,876.40, 28,330.80 and 8,362.60 is: 12,551.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,876.40 : 28,330.80 = 8,362.60 : x
  2. Step 2: Convert to fraction form
    18,876.40/28,330.80 = 8,362.60/x
  3. Step 3: Cross multiply
    18,876.40x = 28,330.80 × 8,362.60
  4. Step 4: Simplify right side
    18,876.40x = 236,919,148.08
  5. Step 5: Solve for x
    x = 236,919,148.08/18,876.40
  6. Step 6: Final answer
    x = 12,551.08

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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.