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Finding the Fourth Proportional to 13,454.80, 20,184.90 and 4,095.40

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Solution

The fourth proportional to 13,454.80, 20,184.90 and 4,095.40 is: 6,143.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,454.80 : 20,184.90 = 4,095.40 : x
  2. Step 2: Convert to fraction form
    13,454.80/20,184.90 = 4,095.40/x
  3. Step 3: Cross multiply
    13,454.80x = 20,184.90 × 4,095.40
  4. Step 4: Simplify right side
    13,454.80x = 82,665,239.46
  5. Step 5: Solve for x
    x = 82,665,239.46/13,454.80
  6. Step 6: Final answer
    x = 6,143.92

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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.