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Finding the Fourth Proportional to 20,466.40, 30,688.80 and 8,766.40

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Solution

The fourth proportional to 20,466.40, 30,688.80 and 8,766.40 is: 13,144.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,466.40 : 30,688.80 = 8,766.40 : x
  2. Step 2: Convert to fraction form
    20,466.40/30,688.80 = 8,766.40/x
  3. Step 3: Cross multiply
    20,466.40x = 30,688.80 × 8,766.40
  4. Step 4: Simplify right side
    20,466.40x = 269,030,296.32
  5. Step 5: Solve for x
    x = 269,030,296.32/20,466.40
  6. Step 6: Final answer
    x = 13,144.97

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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.