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Finding the Fourth Proportional to 13,464.40, 20,158.20 and 8,280.40

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Solution

The fourth proportional to 13,464.40, 20,158.20 and 8,280.40 is: 12,396.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,464.40 : 20,158.20 = 8,280.40 : x
  2. Step 2: Convert to fraction form
    13,464.40/20,158.20 = 8,280.40/x
  3. Step 3: Cross multiply
    13,464.40x = 20,158.20 × 8,280.40
  4. Step 4: Simplify right side
    13,464.40x = 166,917,959.28
  5. Step 5: Solve for x
    x = 166,917,959.28/13,464.40
  6. Step 6: Final answer
    x = 12,396.98

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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.