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Finding the Fourth Proportional to 13,870.46, 20,818.06 and 6,479.09

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Solution

The fourth proportional to 13,870.46, 20,818.06 and 6,479.09 is: 9,724.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,870.46 : 20,818.06 = 6,479.09 : x
  2. Step 2: Convert to fraction form
    13,870.46/20,818.06 = 6,479.09/x
  3. Step 3: Cross multiply
    13,870.46x = 20,818.06 × 6,479.09
  4. Step 4: Simplify right side
    13,870.46x = 134,882,042.15
  5. Step 5: Solve for x
    x = 134,882,042.15/13,870.46
  6. Step 6: Final answer
    x = 9,724.41

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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.