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Finding the Fourth Proportional to 18,705.96, 28,063.80 and 7,020.18

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Solution

The fourth proportional to 18,705.96, 28,063.80 and 7,020.18 is: 10,532.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,705.96 : 28,063.80 = 7,020.18 : x
  2. Step 2: Convert to fraction form
    18,705.96/28,063.80 = 7,020.18/x
  3. Step 3: Cross multiply
    18,705.96x = 28,063.80 × 7,020.18
  4. Step 4: Simplify right side
    18,705.96x = 197,012,927.48
  5. Step 5: Solve for x
    x = 197,012,927.48/18,705.96
  6. Step 6: Final answer
    x = 10,532.09

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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.