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Finding the Fourth Proportional to 18,980.56, 28,474.08 and 8,454.40

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Solution

The fourth proportional to 18,980.56, 28,474.08 and 8,454.40 is: 12,683.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,980.56 : 28,474.08 = 8,454.40 : x
  2. Step 2: Convert to fraction form
    18,980.56/28,474.08 = 8,454.40/x
  3. Step 3: Cross multiply
    18,980.56x = 28,474.08 × 8,454.40
  4. Step 4: Simplify right side
    18,980.56x = 240,731,261.95
  5. Step 5: Solve for x
    x = 240,731,261.95/18,980.56
  6. Step 6: Final answer
    x = 12,683.04

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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.